Remove trailing spaces in analyzer_experimental

pkg/analyzer_experimental/lib/src/generated/engine.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
-
 library engine;
-
 import 'dart:collection' show HasNextIterator;
 import 'java_core.dart';
 import 'java_engine.dart';
 import 'instrumentation.dart';
 import 'error.dart';
 import 'source.dart';
 import 'scanner.dart' show Token, CharBufferScanner, StringScanner;
 import 'ast.dart';
 import 'parser.dart' show Parser;
 import 'sdk.dart' show DartSdk;
 import 'element.dart';
 import 'resolver.dart';
 import 'html.dart' show XmlTagNode, XmlAttributeNode, RecursiveXmlVisitor, HtmlScanner, HtmlScanResult, HtmlParser, HtmlParseResult, HtmlUnit;
-
-
 /**
  * The unique instance of the class {@code AnalysisEngine} serves as the entry point for the
  * functionality provided by the analysis engine.
  * @coverage dart.engine
  */
 class AnalysisEngine {
-  
+
   /**
    * The suffix used for Dart source files.
    */
   static String SUFFIX_DART = "dart";
-  
+
   /**
    * The short suffix used for HTML files.
    */
   static String SUFFIX_HTM = "htm";
-  
+
   /**
    * The long suffix used for HTML files.
    */
   static String SUFFIX_HTML = "html";
-  
+
   /**
    * The unique instance of this class.
    */
   static AnalysisEngine _UniqueInstance = new AnalysisEngine();
-  
+
   /**
    * Return the unique instance of this class.
    * @return the unique instance of this class
    */
   static AnalysisEngine get instance => _UniqueInstance;
-  
+
   /**
    * Return {@code true} if the given file name is assumed to contain Dart source code.
    * @param fileName the name of the file being tested
    * @return {@code true} if the given file name is assumed to contain Dart source code
    */
   static bool isDartFileName(String fileName) {
     if (fileName == null) {
       return false;
     }
     return javaStringEqualsIgnoreCase(FileNameUtilities.getExtension(fileName), SUFFIX_DART);
   }
-  
+
   /**
    * Return {@code true} if the given file name is assumed to contain HTML.
    * @param fileName the name of the file being tested
    * @return {@code true} if the given file name is assumed to contain HTML
    */
   static bool isHtmlFileName(String fileName) {
     if (fileName == null) {
       return false;
     }
     String extension = FileNameUtilities.getExtension(fileName);
     return javaStringEqualsIgnoreCase(extension, SUFFIX_HTML) || javaStringEqualsIgnoreCase(extension, SUFFIX_HTM);
   }
-  
+
   /**
    * The logger that should receive information about errors within the analysis engine.
    */
   Logger _logger = Logger.NULL;
-  
+
   /**
    * Create a new context in which analysis can be performed.
    * @return the analysis context that was created
    */
   AnalysisContext createAnalysisContext() {
     if (Instrumentation.isNullLogger()) {
       return new DelegatingAnalysisContextImpl();
     } else {
       return new InstrumentedAnalysisContextImpl.con1(new DelegatingAnalysisContextImpl());
     }
   }
-  
+
   /**
    * Return the logger that should receive information about errors within the analysis engine.
    * @return the logger that should receive information about errors within the analysis engine
    */
   Logger get logger => _logger;
-  
+
   /**
    * Set the logger that should receive information about errors within the analysis engine to the
    * given logger.
    * @param logger the logger that should receive information about errors within the analysis
    * engine
    */
   void set logger(Logger logger2) {
     this._logger = logger2 == null ? Logger.NULL : logger2;
   }
 }
-
 /**
  * The interface {@code AnalysisContext} defines the behavior of objects that represent a context in
  * which a single analysis can be performed and incrementally maintained. The context includes such
  * information as the version of the SDK being analyzed against as well as the package-root used to
  * resolve 'package:' URI's. (Both of which are known indirectly through the {@link SourceFactorysource factory}.)
  * <p>
  * An analysis context also represents the state of the analysis, which includes knowing which
  * sources have been included in the analysis (either directly or indirectly) and the results of the
  * analysis. Sources must be added and removed from the context using the method{@link #applyChanges(ChangeSet)}, which is also used to notify the context when sources have been
  * modified and, consequently, previously known results might have been invalidated.
@@ skipping 13 matching lines @@
  * up-to-date. For such clients there is a mechanism that allows them to incrementally perform
  * needed analysis and get notified of the consequent changes to the analysis results. This
  * mechanism is realized by the method {@link #performAnalysisTask()}.
  * <p>
  * Analysis engine allows for having more than one context. This can be used, for example, to
  * perform one analysis based on the state of files on disk and a separate analysis based on the
  * state of those files in open editors. It can also be used to perform an analysis based on a
  * proposed future state, such as the state after a refactoring.
  */
 abstract class AnalysisContext {
-  
+
   /**
    * Apply the changes specified by the given change set to this context. Any analysis results that
    * have been invalidated by these changes will be removed.
    * @param changeSet a description of the changes that are to be applied
    */
   void applyChanges(ChangeSet changeSet);
-  
+
   /**
    * Return the documentation comment for the given element as it appears in the original source
    * (complete with the beginning and ending delimiters), or {@code null} if the element does not
    * have a documentation comment associated with it. This can be a long-running operation if the
    * information needed to access the comment is not cached.
    * @param element the element whose documentation comment is to be returned
    * @return the element's documentation comment
    * @throws AnalysisException if the documentation comment could not be determined because the
    * analysis could not be performed
    */
   String computeDocumentationComment(Element element);
-  
+
   /**
    * Return an array containing all of the errors associated with the given source. If the errors
    * are not already known then the source will be analyzed in order to determine the errors
    * associated with it.
    * @param source the source whose errors are to be returned
    * @return all of the errors associated with the given source
    * @throws AnalysisException if the errors could not be determined because the analysis could not
    * be performed
    * @see #getErrors(Source)
    */
   List<AnalysisError> computeErrors(Source source);
-  
+
   /**
    * Return the element model corresponding to the HTML file defined by the given source. If the
    * element model does not yet exist it will be created. The process of creating an element model
    * for an HTML file can long-running, depending on the size of the file and the number of
    * libraries that are defined in it (via script tags) that also need to have a model built for
    * them.
    * @param source the source defining the HTML file whose element model is to be returned
    * @return the element model corresponding to the HTML file defined by the given source
    * @throws AnalysisException if the element model could not be determined because the analysis
    * could not be performed
    * @see #getHtmlElement(Source)
    */
   HtmlElement computeHtmlElement(Source source);
-  
+
   /**
    * Return the kind of the given source, computing it's kind if it is not already known. Return{@link SourceKind#UNKNOWN} if the source is not contained in this context.
    * @param source the source whose kind is to be returned
    * @return the kind of the given source
    * @see #getKindOf(Source)
    */
   SourceKind computeKindOf(Source source);
-  
+
   /**
    * Return the element model corresponding to the library defined by the given source. If the
    * element model does not yet exist it will be created. The process of creating an element model
    * for a library can long-running, depending on the size of the library and the number of
    * libraries that are imported into it that also need to have a model built for them.
    * @param source the source defining the library whose element model is to be returned
    * @return the element model corresponding to the library defined by the given source
    * @throws AnalysisException if the element model could not be determined because the analysis
    * could not be performed
    * @see #getLibraryElement(Source)
    */
   LibraryElement computeLibraryElement(Source source);
-  
+
   /**
    * Return the line information for the given source, or {@code null} if the source is not of a
    * recognized kind (neither a Dart nor HTML file). If the line information was not previously
    * known it will be created. The line information is used to map offsets from the beginning of the
    * source to line and column pairs.
    * @param source the source whose line information is to be returned
    * @return the line information for the given source
    * @throws AnalysisException if the line information could not be determined because the analysis
    * could not be performed
    * @see #getLineInfo(Source)
    */
   LineInfo computeLineInfo(Source source);
-  
+
   /**
    * Create a new context in which analysis can be performed. Any sources in the specified container
    * will be removed from this context and added to the newly created context.
    * @param container the container containing sources that should be removed from this context and
    * added to the returned context
    * @return the analysis context that was created
    */
   AnalysisContext extractContext(SourceContainer container);
-  
+
   /**
    * Return the set of analysis options controlling the behavior of this context.
    * @return the set of analysis options controlling the behavior of this context
    */
   AnalysisOptions get analysisOptions;
-  
+
   /**
    * Return the element referenced by the given location, or {@code null} if the element is not
    * immediately available or if there is no element with the given location. The latter condition
    * can occur, for example, if the location describes an element from a different context or if the
    * element has been removed from this context as a result of some change since it was originally
    * obtained.
    * @param location the reference describing the element to be returned
    * @return the element referenced by the given location
    */
   Element getElement(ElementLocation location);
-  
+
   /**
    * Return an analysis error info containing the array of all of the errors and the line info
    * associated with the given source. The array of errors will be empty if the source is not known
    * to this context or if there are no errors in the source. The errors contained in the array can
    * be incomplete.
    * @param source the source whose errors are to be returned
    * @return all of the errors associated with the given source and the line info
    * @see #computeErrors(Source)
    */
   AnalysisErrorInfo getErrors(Source source);
-  
+
   /**
    * Return the element model corresponding to the HTML file defined by the given source, or{@code null} if the source does not represent an HTML file, the element representing the file
    * has not yet been created, or the analysis of the HTML file failed for some reason.
    * @param source the source defining the HTML file whose element model is to be returned
    * @return the element model corresponding to the HTML file defined by the given source
    * @see #computeHtmlElement(Source)
    */
   HtmlElement getHtmlElement(Source source);
-  
+
   /**
    * Return the sources for the HTML files that reference the given compilation unit. If the source
    * does not represent a Dart source or is not known to this context, the returned array will be
    * empty. The contents of the array can be incomplete.
    * @param source the source referenced by the returned HTML files
    * @return the sources for the HTML files that reference the given compilation unit
    */
   List<Source> getHtmlFilesReferencing(Source source);
-  
+
   /**
    * Return an array containing all of the sources known to this context that represent HTML files.
    * The contents of the array can be incomplete.
    * @return the sources known to this context that represent HTML files
    */
   List<Source> get htmlSources;
-  
+
   /**
    * Return the kind of the given source, or {@code null} if the kind is not known to this context.
    * @param source the source whose kind is to be returned
    * @return the kind of the given source
    * @see #computeKindOf(Source)
    */
   SourceKind getKindOf(Source source);
-  
+
   /**
    * Return an array containing all of the sources known to this context that represent the defining
    * compilation unit of a library that can be run within a browser. The sources that are returned
    * represent libraries that have a 'main' method and are either referenced by an HTML file or
    * import, directly or indirectly, a client-only library. The contents of the array can be
    * incomplete.
    * @return the sources known to this context that represent the defining compilation unit of a
    * library that can be run within a browser
    */
   List<Source> get launchableClientLibrarySources;
-  
+
   /**
    * Return an array containing all of the sources known to this context that represent the defining
    * compilation unit of a library that can be run outside of a browser. The contents of the array
    * can be incomplete.
    * @return the sources known to this context that represent the defining compilation unit of a
    * library that can be run outside of a browser
    */
   List<Source> get launchableServerLibrarySources;
-  
+
   /**
    * Return the sources for the defining compilation units of any libraries of which the given
    * source is a part. The array will normally contain a single library because most Dart sources
    * are only included in a single library, but it is possible to have a part that is contained in
    * multiple identically named libraries. If the source represents the defining compilation unit of
    * a library, then the returned array will contain the given source as its only element. If the
    * source does not represent a Dart source or is not known to this context, the returned array
    * will be empty. The contents of the array can be incomplete.
    * @param source the source contained in the returned libraries
    * @return the sources for the libraries containing the given source
    */
   List<Source> getLibrariesContaining(Source source);
-  
+
   /**
    * Return the sources for the defining compilation units of any libraries that depend on the given
    * library. One library depends on another if it either imports or exports that library.
    * @param librarySource the source for the defining compilation unit of the library being depended
    * on
    * @return the sources for the libraries that depend on the given library
    */
   List<Source> getLibrariesDependingOn(Source librarySource);
-  
+
   /**
    * Return the element model corresponding to the library defined by the given source, or{@code null} if the element model does not currently exist or if the library cannot be analyzed
    * for some reason.
    * @param source the source defining the library whose element model is to be returned
    * @return the element model corresponding to the library defined by the given source
    */
   LibraryElement getLibraryElement(Source source);
-  
+
   /**
    * Return an array containing all of the sources known to this context that represent the defining
    * compilation unit of a library. The contents of the array can be incomplete.
    * @return the sources known to this context that represent the defining compilation unit of a
    * library
    */
   List<Source> get librarySources;
-  
+
   /**
    * Return the line information for the given source, or {@code null} if the line information is
    * not known. The line information is used to map offsets from the beginning of the source to line
    * and column pairs.
    * @param source the source whose line information is to be returned
    * @return the line information for the given source
    * @see #computeLineInfo(Source)
    */
   LineInfo getLineInfo(Source source);
-  
+
   /**
    * Return a fully resolved AST for a single compilation unit within the given library, or{@code null} if the resolved AST is not already computed.
    * @param unitSource the source of the compilation unit
    * @param library the library containing the compilation unit
    * @return a fully resolved AST for the compilation unit
    * @see #resolveCompilationUnit(Source,LibraryElement)
    */
   CompilationUnit getResolvedCompilationUnit(Source unitSource, LibraryElement library);
-  
+
   /**
    * Return a fully resolved AST for a single compilation unit within the given library, or{@code null} if the resolved AST is not already computed.
    * @param unitSource the source of the compilation unit
    * @param librarySource the source of the defining compilation unit of the library containing the
    * compilation unit
    * @return a fully resolved AST for the compilation unit
    * @see #resolveCompilationUnit(Source,Source)
    */
   CompilationUnit getResolvedCompilationUnit2(Source unitSource, Source librarySource);
-  
+
   /**
    * Return the source factory used to create the sources that can be analyzed in this context.
    * @return the source factory used to create the sources that can be analyzed in this context
    */
   SourceFactory get sourceFactory;
-  
+
   /**
    * Return {@code true} if the given source is known to be the defining compilation unit of a
    * library that can be run on a client (references 'dart:html', either directly or indirectly).
    * <p>
    * <b>Note:</b> In addition to the expected case of returning {@code false} if the source is known
    * to be a library that cannot be run on a client, this method will also return {@code false} if
    * the source is not known to be a library or if we do not know whether it can be run on a client.
    * @param librarySource the source being tested
    * @return {@code true} if the given source is known to be a library that can be run on a client
    */
   bool isClientLibrary(Source librarySource);
-  
+
   /**
    * Return {@code true} if the given source is known to be the defining compilation unit of a
    * library that can be run on the server (does not reference 'dart:html', either directly or
    * indirectly).
    * <p>
    * <b>Note:</b> In addition to the expected case of returning {@code false} if the source is known
    * to be a library that cannot be run on the server, this method will also return {@code false} if
    * the source is not known to be a library or if we do not know whether it can be run on the
    * server.
    * @param librarySource the source being tested
    * @return {@code true} if the given source is known to be a library that can be run on the server
    */
   bool isServerLibrary(Source librarySource);
-  
+
   /**
    * Add the sources contained in the specified context to this context's collection of sources.
    * This method is called when an existing context's pubspec has been removed, and the contained
    * sources should be reanalyzed as part of this context.
    * @param context the context being merged
    */
   void mergeContext(AnalysisContext context);
-  
+
   /**
    * Parse a single source to produce an AST structure. The resulting AST structure may or may not
    * be resolved, and may have a slightly different structure depending upon whether it is resolved.
    * @param source the source to be parsed
    * @return the AST structure representing the content of the source
    * @throws AnalysisException if the analysis could not be performed
    */
   CompilationUnit parseCompilationUnit(Source source);
-  
+
   /**
    * Parse a single HTML source to produce an AST structure. The resulting HTML AST structure may or
    * may not be resolved, and may have a slightly different structure depending upon whether it is
    * resolved.
    * @param source the HTML source to be parsed
    * @return the parse result (not {@code null})
    * @throws AnalysisException if the analysis could not be performed
    */
   HtmlUnit parseHtmlUnit(Source source);
-  
+
   /**
    * Perform the next unit of work required to keep the analysis results up-to-date and return
    * information about the consequent changes to the analysis results. If there were no results the
    * returned array will be empty. If there are no more units of work required, then this method
    * returns {@code null}. This method can be long running.
    * @return an array containing notices of changes to the analysis results
    */
   List<ChangeNotice> performAnalysisTask();
-  
+
   /**
    * Parse and resolve a single source within the given context to produce a fully resolved AST.
    * @param unitSource the source to be parsed and resolved
    * @param library the library containing the source to be resolved
    * @return the result of resolving the AST structure representing the content of the source in the
    * context of the given library
    * @throws AnalysisException if the analysis could not be performed
    * @see #getResolvedCompilationUnit(Source,LibraryElement)
    */
   CompilationUnit resolveCompilationUnit(Source unitSource, LibraryElement library);
-  
+
   /**
    * Parse and resolve a single source within the given context to produce a fully resolved AST.
    * @param unitSource the source to be parsed and resolved
    * @param librarySource the source of the defining compilation unit of the library containing the
    * source to be resolved
    * @return the result of resolving the AST structure representing the content of the source in the
    * context of the given library
    * @throws AnalysisException if the analysis could not be performed
    * @see #getResolvedCompilationUnit(Source,Source)
    */
   CompilationUnit resolveCompilationUnit2(Source unitSource, Source librarySource);
-  
+
   /**
    * Parse and resolve a single source within the given context to produce a fully resolved AST.
    * @param htmlSource the source to be parsed and resolved
    * @return the result of resolving the AST structure representing the content of the source
    * @throws AnalysisException if the analysis could not be performed
    */
   HtmlUnit resolveHtmlUnit(Source htmlSource);
-  
+
   /**
    * Set the set of analysis options controlling the behavior of this context to the given options.
    * Clients can safely assume that all necessary analysis results have been invalidated.
    * @param options the set of analysis options that will control the behavior of this context
    */
   void set analysisOptions(AnalysisOptions options);
-  
+
   /**
    * Set the contents of the given source to the given contents and mark the source as having
    * changed. This has the effect of overriding the default contents of the source. If the contents
    * are {@code null} the override is removed so that the default contents will be returned.
    * @param source the source whose contents are being overridden
    * @param contents the new contents of the source
    */
   void setContents(Source source, String contents);
-  
+
   /**
    * Set the source factory used to create the sources that can be analyzed in this context to the
    * given source factory. Clients can safely assume that all analysis results have been
    * invalidated.
    * @param factory the source factory used to create the sources that can be analyzed in this
    * context
    */
   void set sourceFactory(SourceFactory factory);
-  
+
   /**
    * Given a collection of sources with content that has changed, return an {@link Iterable}identifying the sources that need to be resolved.
    * @param changedSources an array of sources (not {@code null}, contains no {@code null}s)
    * @return An iterable returning the sources to be resolved
    */
   Iterable<Source> sourcesToResolve(List<Source> changedSources);
 }
-
 /**
  * The interface {@code AnalysisErrorInfo} contains the analysis errors and line information for the
  * errors.
  */
 abstract class AnalysisErrorInfo {
-  
+
   /**
    * Return the errors that as a result of the analysis, or {@code null} if there were no errors.
    * @return the errors as a result of the analysis
    */
   List<AnalysisError> get errors;
-  
+
   /**
    * Return the line information associated with the errors, or {@code null} if there were no
    * errors.
    * @return the line information associated with the errors
    */
   LineInfo get lineInfo;
 }
-
 /**
  * Instances of the class {@code AnalysisException} represent an exception that occurred during the
  * analysis of one or more sources.
  * @coverage dart.engine
  */
 class AnalysisException extends JavaException {
-  
+
   /**
    * Initialize a newly created exception.
    */
   AnalysisException() : super() {
     _jtd_constructor_125_impl();
   }
   _jtd_constructor_125_impl() {
   }
-  
+
   /**
    * Initialize a newly created exception to have the given message.
    * @param message the message associated with the exception
    */
   AnalysisException.con1(String message) : super(message) {
     _jtd_constructor_126_impl(message);
   }
   _jtd_constructor_126_impl(String message) {
   }
-  
+
   /**
    * Initialize a newly created exception to have the given message and cause.
    * @param message the message associated with the exception
    * @param cause the underlying exception that caused this exception
    */
   AnalysisException.con2(String message, Exception cause) : super(message, cause) {
     _jtd_constructor_127_impl(message, cause);
   }
   _jtd_constructor_127_impl(String message, Exception cause) {
   }
-  
+
   /**
    * Initialize a newly created exception to have the given cause.
    * @param cause the underlying exception that caused this exception
    */
   AnalysisException.con3(Exception cause) : super.withCause(cause) {
     _jtd_constructor_128_impl(cause);
   }
   _jtd_constructor_128_impl(Exception cause) {
   }
 }
-
 /**
  * The interface {@code AnalysisOptions} defines the behavior of objects that provide access to a
  * set of analysis options used to control the behavior of an analysis context.
  */
 abstract class AnalysisOptions {
-  
+
   /**
    * Return {@code true} if analysis is to use strict mode. In strict mode, error reporting is based
    * exclusively on the static type information.
    * @return {@code true} if analysis is to use strict mode
    */
   bool get strictMode;
 }
-
 /**
  * The interface {@code ChangeNotice} defines the behavior of objects that represent a change to the
  * analysis results associated with a given source.
  * @coverage dart.engine
  */
 abstract class ChangeNotice implements AnalysisErrorInfo {
-  
+
   /**
    * Return the fully resolved AST that changed as a result of the analysis, or {@code null} if the
    * AST was not changed.
    * @return the fully resolved AST that changed as a result of the analysis
    */
   CompilationUnit get compilationUnit;
-  
+
   /**
    * Return the source for which the result is being reported.
    * @return the source for which the result is being reported
    */
   Source get source;
 }
-
 /**
  * Instances of the class {@code ChangeSet} indicate what sources have been added, changed, or
  * removed.
  * @coverage dart.engine
  */
 class ChangeSet {
-  
+
   /**
    * A list containing the sources that have been added.
    */
   List<Source> _added2 = new List<Source>();
-  
+
   /**
    * A list containing the sources that have been changed.
    */
   List<Source> _changed2 = new List<Source>();
-  
+
   /**
    * A list containing the sources that have been removed.
    */
   List<Source> _removed2 = new List<Source>();
-  
+
   /**
    * A list containing the source containers specifying additional sources that have been removed.
    */
   List<SourceContainer> _removedContainers = new List<SourceContainer>();
-  
+
   /**
    * Record that the specified source has been added and that it's content is the default contents
    * of the source.
    * @param source the source that was added
    */
   void added(Source source) {
     _added2.add(source);
   }
-  
+
   /**
    * Record that the specified source has been changed and that it's content is the default contents
    * of the source.
    * @param source the source that was changed
    */
   void changed(Source source) {
     _changed2.add(source);
   }
-  
+
   /**
    * Return a collection of the sources that have been added.
    * @return a collection of the sources that have been added
    */
   List<Source> get added3 => _added2;
-  
+
   /**
    * Return a collection of sources that have been changed.
    * @return a collection of sources that have been changed
    */
   List<Source> get changed3 => _changed2;
-  
+
   /**
    * Return a list containing the sources that were removed.
    * @return a list containing the sources that were removed
    */
   List<Source> get removed => _removed2;
-  
+
   /**
    * Return a list containing the source containers that were removed.
    * @return a list containing the source containers that were removed
    */
   List<SourceContainer> get removedContainers => _removedContainers;
-  
+
   /**
    * Return {@code true} if this change set does not contain any changes.
    * @return {@code true} if this change set does not contain any changes
    */
   bool isEmpty() => _added2.isEmpty && _changed2.isEmpty && _removed2.isEmpty && _removedContainers.isEmpty;
-  
+
   /**
    * Record that the specified source has been removed.
    * @param source the source that was removed
    */
   void removed3(Source source) {
     if (source != null) {
       _removed2.add(source);
     }
   }
-  
+
   /**
    * Record that the specified source container has been removed.
    * @param container the source container that was removed
    */
   void removedContainer(SourceContainer container) {
     if (container != null) {
       _removedContainers.add(container);
     }
   }
 }
-
 /**
  * The interface {@code DartEntry} defines the behavior of objects that maintain the information
  * cached by an analysis context about an individual Dart file.
  * @coverage dart.engine
  */
 abstract class DartEntry implements SourceEntry {
-  
+
   /**
    * The data descriptor representing the library element for the library. This data is only
    * available for Dart files that are the defining compilation unit of a library.
    */
   static DataDescriptor<LibraryElement> ELEMENT = new DataDescriptor<LibraryElement>("DartEntry.ELEMENT");
-  
+
   /**
    * The data descriptor representing the list of referenced libraries. This data is only available
    * for Dart files that are the defining compilation unit of a library.
    */
   static DataDescriptor<List<Source>> REFERENCED_LIBRARIES = new DataDescriptor<List<Source>>("DartEntry.REFERENCED_LIBRARIES");
-  
+
   /**
    * The data descriptor representing the list of included parts. This data is only available for
    * Dart files that are the defining compilation unit of a library.
    */
   static DataDescriptor<List<Source>> INCLUDED_PARTS = new DataDescriptor<List<Source>>("DartEntry.INCLUDED_PARTS");
-  
+
   /**
    * The data descriptor representing the client flag. This data is only available for Dart files
    * that are the defining compilation unit of a library.
    */
   static DataDescriptor<bool> IS_CLIENT = new DataDescriptor<bool>("DartEntry.IS_CLIENT");
-  
+
   /**
    * The data descriptor representing the launchable flag. This data is only available for Dart
    * files that are the defining compilation unit of a library.
    */
   static DataDescriptor<bool> IS_LAUNCHABLE = new DataDescriptor<bool>("DartEntry.IS_LAUNCHABLE");
-  
+
   /**
    * The data descriptor representing the errors resulting from parsing the source.
    */
   static DataDescriptor<List<AnalysisError>> PARSE_ERRORS = new DataDescriptor<List<AnalysisError>>("DartEntry.PARSE_ERRORS");
-  
+
   /**
    * The data descriptor representing the parsed AST structure.
    */
   static DataDescriptor<CompilationUnit> PARSED_UNIT = new DataDescriptor<CompilationUnit>("DartEntry.PARSED_UNIT");
-  
+
   /**
    * The data descriptor representing the public namespace of the library. This data is only
    * available for Dart files that are the defining compilation unit of a library.
    */
   static DataDescriptor<Namespace> PUBLIC_NAMESPACE = new DataDescriptor<Namespace>("DartEntry.PUBLIC_NAMESPACE");
-  
+
   /**
    * The data descriptor representing the errors resulting from resolving the source.
    */
   static DataDescriptor<List<AnalysisError>> RESOLUTION_ERRORS = new DataDescriptor<List<AnalysisError>>("DartEntry.RESOLUTION_ERRORS");
-  
+
   /**
    * The data descriptor representing the resolved AST structure.
    */
   static DataDescriptor<CompilationUnit> RESOLVED_UNIT = new DataDescriptor<CompilationUnit>("DartEntry.RESOLVED_UNIT");
-  
+
   /**
    * The data descriptor representing the source kind.
    */
   static DataDescriptor<SourceKind> SOURCE_KIND = new DataDescriptor<SourceKind>("DartEntry.SOURCE_KIND");
-  
+
   /**
    * Return all of the errors associated with the compilation unit that are currently cached.
    * @return all of the errors associated with the compilation unit
    */
   List<AnalysisError> get allErrors;
-  
+
   /**
    * Return a valid parsed compilation unit, either an unresolved AST structure or the result of
    * resolving the AST structure in the context of some library, or {@code null} if there is no
    * parsed compilation unit available.
    * @return a valid parsed compilation unit
    */
   CompilationUnit get anyParsedCompilationUnit;
-  
+
   /**
    * Return the result of resolving the compilation unit as part of any library, or {@code null} if
    * there is no cached resolved compilation unit.
    * @return any resolved compilation unit
    */
   CompilationUnit get anyResolvedCompilationUnit;
-  
+
   /**
    * Return the state of the data represented by the given descriptor in the context of the given
    * library.
    * @param descriptor the descriptor representing the data whose state is to be returned
    * @param librarySource the source of the defining compilation unit of the library that is the
    * context for the data
    * @return the value of the data represented by the given descriptor and library
    */
   CacheState getState2(DataDescriptor<Object> descriptor, Source librarySource);
-  
+
   /**
    * Return the value of the data represented by the given descriptor in the context of the given
    * library, or {@code null} if the data represented by the descriptor is not in the cache.
    * @param descriptor the descriptor representing which data is to be returned
    * @param librarySource the source of the defining compilation unit of the library that is the
    * context for the data
    * @return the value of the data represented by the given descriptor and library
    */
   Object getValue2(DataDescriptor descriptor, Source librarySource);
   DartEntryImpl get writableCopy;
 }
-
 /**
  * Instances of the class {@code DartEntryImpl} implement a {@link DartEntry}.
  * @coverage dart.engine
  */
 class DartEntryImpl extends SourceEntryImpl implements DartEntry {
-  
+
   /**
    * The state of the cached source kind.
    */
   CacheState _sourceKindState = CacheState.INVALID;
-  
+
   /**
    * The kind of this source.
    */
   SourceKind _sourceKind = SourceKind.UNKNOWN;
-  
+
   /**
    * The state of the cached parsed compilation unit.
    */
   CacheState _parsedUnitState = CacheState.INVALID;
-  
+
   /**
    * The parsed compilation unit, or {@code null} if the parsed compilation unit is not currently
    * cached.
    */
   CompilationUnit _parsedUnit;
-  
+
   /**
    * The state of the cached parse errors.
    */
   CacheState _parseErrorsState = CacheState.INVALID;
-  
+
   /**
    * The errors produced while scanning and parsing the compilation unit, or {@code null} if the
    * errors are not currently cached.
    */
   List<AnalysisError> _parseErrors = AnalysisError.NO_ERRORS;
-  
+
   /**
    * The state of the cached list of included parts.
    */
   CacheState _includedPartsState = CacheState.INVALID;
-  
+
   /**
    * The list of parts included in the library, or an empty array if the list is not currently
    * cached. The list will be empty if the Dart file is a part rather than a library.
    */
   List<Source> _includedParts = Source.EMPTY_ARRAY;
-  
+
   /**
    * The state of the cached list of referenced libraries.
    */
   CacheState _referencedLibrariesState = CacheState.INVALID;
-  
+
   /**
    * The list of libraries referenced (imported or exported) by the library, or an empty array if
    * the list is not currently cached. The list will be empty if the Dart file is a part rather than
    * a library.
    */
   List<Source> _referencedLibraries = Source.EMPTY_ARRAY;
-  
+
   /**
    * The information known as a result of resolving this compilation unit as part of the library
    * that contains this unit. This field will never be {@code null}.
    */
   DartEntryImpl_ResolutionState _resolutionState = new DartEntryImpl_ResolutionState();
-  
+
   /**
    * The state of the cached library element.
    */
   CacheState _elementState = CacheState.INVALID;
-  
+
   /**
    * The element representing the library, or {@code null} if the element is not currently cached.
    */
   LibraryElement _element;
-  
+
   /**
    * The state of the cached public namespace.
    */
   CacheState _publicNamespaceState = CacheState.INVALID;
-  
+
   /**
    * The public namespace of the library, or {@code null} if the namespace is not currently cached.
    */
   Namespace _publicNamespace;
-  
+
   /**
    * The state of the cached client/ server flag.
    */
   CacheState _clientServerState = CacheState.INVALID;
-  
+
   /**
    * The state of the cached launchable flag.
    */
   CacheState _launchableState = CacheState.INVALID;
-  
+
   /**
    * An integer holding bit masks such as {@link #LAUNCHABLE} and {@link #CLIENT_CODE}.
    */
   int _bitmask = 0;
-  
+
   /**
    * Mask indicating that this library is launchable: that the file has a main method.
    */
   static int _LAUNCHABLE = 1 << 1;
-  
+
   /**
    * Mask indicating that the library is client code: that the library depends on the html library.
    * If the library is not "client code", then it is referenced as "server code".
    */
   static int _CLIENT_CODE = 1 << 2;
   List<AnalysisError> get allErrors {
     List<AnalysisError> errors = new List<AnalysisError>();
     for (AnalysisError error in _parseErrors) {
       errors.add(error);
     }
@@ skipping 111 matching lines @@
       return null;
     } else {
       throw new IllegalArgumentException("Invalid descriptor: ${descriptor}");
     }
   }
   DartEntryImpl get writableCopy {
     DartEntryImpl copy = new DartEntryImpl();
     copy.copyFrom(this);
     return copy;
   }
-  
+
   /**
    * Invalidate all of the information associated with the compilation unit.
    */
   void invalidateAllInformation() {
     setState(SourceEntry.LINE_INFO, CacheState.INVALID);
     _sourceKind = SourceKind.UNKNOWN;
     _sourceKindState = CacheState.INVALID;
     _parseErrors = AnalysisError.NO_ERRORS;
     _parseErrorsState = CacheState.INVALID;
     _parsedUnit = null;
     _parsedUnitState = CacheState.INVALID;
     invalidateAllResolutionInformation();
   }
-  
+
   /**
    * Invalidate all of the resolution information associated with the compilation unit.
    */
   void invalidateAllResolutionInformation() {
     _element = null;
     _elementState = CacheState.INVALID;
     _includedParts = Source.EMPTY_ARRAY;
     _includedPartsState = CacheState.INVALID;
     _referencedLibraries = Source.EMPTY_ARRAY;
     _referencedLibrariesState = CacheState.INVALID;
     _bitmask = 0;
     _clientServerState = CacheState.INVALID;
     _launchableState = CacheState.INVALID;
     _publicNamespace = null;
     _publicNamespaceState = CacheState.INVALID;
     _resolutionState.invalidateAllResolutionInformation();
   }
-  
+
   /**
    * Record that an error occurred while attempting to scan or parse the entry represented by this
    * entry. This will set the state of all information, including any resolution-based information,
    * as being in error.
    */
   void recordParseError() {
     setState(SourceEntry.LINE_INFO, CacheState.ERROR);
     _sourceKind = SourceKind.UNKNOWN;
     _sourceKindState = CacheState.ERROR;
     _parseErrors = AnalysisError.NO_ERRORS;
     _parseErrorsState = CacheState.ERROR;
     _parsedUnit = null;
     _parsedUnitState = CacheState.ERROR;
     recordResolutionError();
   }
-  
+
   /**
    * Record that the parse-related information for the associated source is about to be computed by
    * the current thread.
    */
   void recordParseInProcess() {
     if (getState(SourceEntry.LINE_INFO) != CacheState.VALID) {
       setState(SourceEntry.LINE_INFO, CacheState.IN_PROCESS);
     }
     if (_sourceKindState != CacheState.VALID) {
       _sourceKindState = CacheState.IN_PROCESS;
     }
     if (_parseErrorsState != CacheState.VALID) {
       _parseErrorsState = CacheState.IN_PROCESS;
     }
     if (_parsedUnitState != CacheState.VALID) {
       _parsedUnitState = CacheState.IN_PROCESS;
     }
   }
-  
+
   /**
    * Record that an error occurred while attempting to scan or parse the entry represented by this
    * entry. This will set the state of all resolution-based information as being in error, but will
    * not change the state of any parse results.
    */
   void recordResolutionError() {
     _element = null;
     _elementState = CacheState.ERROR;
     _includedParts = Source.EMPTY_ARRAY;
     _includedPartsState = CacheState.ERROR;
     _referencedLibraries = Source.EMPTY_ARRAY;
     _referencedLibrariesState = CacheState.ERROR;
     _bitmask = 0;
     _clientServerState = CacheState.ERROR;
     _launchableState = CacheState.ERROR;
     _publicNamespace = null;
     _publicNamespaceState = CacheState.ERROR;
     _resolutionState.recordResolutionError();
   }
-  
+
   /**
    * Remove any resolution information associated with this compilation unit being part of the given
    * library, presumably because it is no longer part of the library.
    * @param librarySource the source of the defining compilation unit of the library that used to
    * contain this part but no longer does
    */
   void removeResolution(Source librarySource2) {
     if (librarySource2 != null) {
       if (librarySource2 == _resolutionState._librarySource) {
         if (_resolutionState._nextState == null) {
           _resolutionState.invalidateAllResolutionInformation();
         } else {
           _resolutionState = _resolutionState._nextState;
         }
       } else {
         DartEntryImpl_ResolutionState priorState = _resolutionState;
         DartEntryImpl_ResolutionState state = _resolutionState._nextState;
         while (state != null) {
           if (librarySource2 == state._librarySource) {
             priorState._nextState = state._nextState;
             break;
           }
           priorState = state;
           state = state._nextState;
         }
       }
     }
   }
-  
+
   /**
    * Set the results of parsing the compilation unit at the given time to the given values.
    * @param modificationStamp the earliest time at which the source was last modified before the
    * parsing was started
    * @param lineInfo the line information resulting from parsing the compilation unit
    * @param unit the AST structure resulting from parsing the compilation unit
    * @param errors the parse errors resulting from parsing the compilation unit
    */
   void setParseResults(int modificationStamp, LineInfo lineInfo, CompilationUnit unit, List<AnalysisError> errors) {
     if (getState(SourceEntry.LINE_INFO) != CacheState.VALID) {
@@ skipping 31 matching lines @@
     } else if (identical(descriptor, DartEntry.REFERENCED_LIBRARIES)) {
       _referencedLibraries = updatedValue(state, _referencedLibraries, Source.EMPTY_ARRAY);
       _referencedLibrariesState = state;
     } else if (identical(descriptor, DartEntry.SOURCE_KIND)) {
       _sourceKind = updatedValue(state, _sourceKind, SourceKind.UNKNOWN);
       _sourceKindState = state;
     } else {
       super.setState(descriptor, state);
     }
   }
-  
+
   /**
    * Set the state of the data represented by the given descriptor in the context of the given
    * library to the given state.
    * @param descriptor the descriptor representing the data whose state is to be set
    * @param librarySource the source of the defining compilation unit of the library that is the
    * context for the data
    * @param cacheState the new state of the data represented by the given descriptor
    */
   void setState2(DataDescriptor<Object> descriptor, Source librarySource, CacheState cacheState) {
     DartEntryImpl_ResolutionState state = getOrCreateResolutionState(librarySource);
@@ skipping 40 matching lines @@
     } else if (identical(descriptor, DartEntry.REFERENCED_LIBRARIES)) {
       _referencedLibraries = value == null ? Source.EMPTY_ARRAY : (value as List<Source>);
       _referencedLibrariesState = CacheState.VALID;
     } else if (identical(descriptor, DartEntry.SOURCE_KIND)) {
       _sourceKind = value as SourceKind;
       _sourceKindState = CacheState.VALID;
     } else {
       super.setValue(descriptor, value);
     }
   }
-  
+
   /**
    * Set the value of the data represented by the given descriptor in the context of the given
    * library to the given value, and set the state of that data to {@link CacheState#VALID}.
    * @param descriptor the descriptor representing which data is to have its value set
    * @param librarySource the source of the defining compilation unit of the library that is the
    * context for the data
    * @param value the new value of the data represented by the given descriptor and library
    */
   void setValue2(DataDescriptor descriptor, Source librarySource, Object value) {
     DartEntryImpl_ResolutionState state = getOrCreateResolutionState(librarySource);
@@ skipping 20 matching lines @@
     _referencedLibraries = other._referencedLibraries;
     _resolutionState.copyFrom(other._resolutionState);
     _elementState = other._elementState;
     _element = other._element;
     _publicNamespaceState = other._publicNamespaceState;
     _publicNamespace = other._publicNamespace;
     _clientServerState = other._clientServerState;
     _launchableState = other._launchableState;
     _bitmask = other._bitmask;
   }
-  
+
   /**
    * Return a resolution state for the specified library, creating one as necessary.
    * @param librarySource the library source (not {@code null})
    * @return the resolution state (not {@code null})
    */
   DartEntryImpl_ResolutionState getOrCreateResolutionState(Source librarySource2) {
     DartEntryImpl_ResolutionState state = _resolutionState;
     if (state._librarySource == null) {
       state._librarySource = librarySource2;
       return state;
     }
     while (state._librarySource != librarySource2) {
       if (state._nextState == null) {
         DartEntryImpl_ResolutionState newState = new DartEntryImpl_ResolutionState();
         newState._librarySource = librarySource2;
         state._nextState = newState;
         return newState;
       }
       state = state._nextState;
     }
     return state;
   }
-  
+
   /**
    * Given that one of the flags is being transitioned to the given state, return the value of the
    * flags that should be kept in the cache.
    * @param state the state to which the data is being transitioned
    * @param currentValue the value of the flags before the transition
    * @param bitMask the mask used to access the bit whose state is being set
    * @return the value of the data that should be kept in the cache
    */
   int updatedValue2(CacheState state, int currentValue, int bitMask) {
     if (identical(state, CacheState.VALID)) {
       throw new IllegalArgumentException("Use setValue() to set the state to VALID");
     } else if (identical(state, CacheState.IN_PROCESS)) {
       return currentValue;
     }
     return currentValue &= ~bitMask;
   }
 }
-
 /**
  * Instances of the class {@code ResolutionState} represent the information produced by resolving
  * a compilation unit as part of a specific library.
  */
 class DartEntryImpl_ResolutionState {
-  
+
   /**
    * The next resolution state or {@code null} if none.
    */
   DartEntryImpl_ResolutionState _nextState;
-  
+
   /**
    * The source for the defining compilation unit of the library that contains this unit. If this
    * unit is the defining compilation unit for it's library, then this will be the source for this
    * unit.
    */
   Source _librarySource;
-  
+
   /**
    * The state of the cached resolved compilation unit.
    */
   CacheState _resolvedUnitState = CacheState.INVALID;
-  
+
   /**
    * The resolved compilation unit, or {@code null} if the resolved compilation unit is not
    * currently cached.
    */
   CompilationUnit _resolvedUnit;
-  
+
   /**
    * The state of the cached resolution errors.
    */
   CacheState _resolutionErrorsState = CacheState.INVALID;
-  
+
   /**
    * The errors produced while resolving the compilation unit, or {@code null} if the errors are
    * not currently cached.
    */
   List<AnalysisError> _resolutionErrors = AnalysisError.NO_ERRORS;
-  
+
   /**
    * Set this state to be exactly like the given state, recursively copying the next state as
    * necessary.
    * @param other the state to be copied
    */
   void copyFrom(DartEntryImpl_ResolutionState other) {
     _librarySource = other._librarySource;
     _resolvedUnitState = other._resolvedUnitState;
     _resolvedUnit = other._resolvedUnit;
     _resolutionErrorsState = other._resolutionErrorsState;
     _resolutionErrors = other._resolutionErrors;
     if (other._nextState != null) {
       _nextState = new DartEntryImpl_ResolutionState();
       _nextState.copyFrom(other._nextState);
     }
   }
-  
+
   /**
    * Invalidate all of the resolution information associated with the compilation unit.
    */
   void invalidateAllResolutionInformation() {
     _nextState = null;
     _librarySource = null;
     _resolvedUnitState = CacheState.INVALID;
     _resolvedUnit = null;
     _resolutionErrorsState = CacheState.INVALID;
     _resolutionErrors = AnalysisError.NO_ERRORS;
   }
-  
+
   /**
    * Record that an error occurred while attempting to scan or parse the entry represented by this
    * entry. This will set the state of all resolution-based information as being in error, but
    * will not change the state of any parse results.
    */
   void recordResolutionError() {
     _nextState = null;
     _librarySource = null;
     _resolvedUnitState = CacheState.ERROR;
     _resolvedUnit = null;
     _resolutionErrorsState = CacheState.ERROR;
     _resolutionErrors = AnalysisError.NO_ERRORS;
   }
 }
-
 /**
  * Instances of the class {@code DataDescriptor} are immutable constants representing data that can
  * be stored in the cache.
  */
 class DataDescriptor<E> {
-  
+
   /**
    * The name of the descriptor, used for debugging purposes.
    */
   String _name;
-  
+
   /**
    * Initialize a newly created descriptor to have the given name.
    * @param name the name of the descriptor
    */
   DataDescriptor(String name) {
     this._name = name;
   }
   String toString() => _name;
 }
-
 /**
  * The interface {@code HtmlEntry} defines the behavior of objects that maintain the information
  * cached by an analysis context about an individual HTML file.
  * @coverage dart.engine
  */
 abstract class HtmlEntry implements SourceEntry {
-  
+
   /**
    * The data descriptor representing the HTML element.
    */
   static DataDescriptor<HtmlElement> ELEMENT = new DataDescriptor<HtmlElement>("HtmlEntry.ELEMENT");
-  
+
   /**
    * The data descriptor representing the parsed AST structure.
    */
   static DataDescriptor<HtmlUnit> PARSED_UNIT = new DataDescriptor<HtmlUnit>("HtmlEntry.PARSED_UNIT");
-  
+
   /**
    * The data descriptor representing the list of referenced libraries.
    */
   static DataDescriptor<List<Source>> REFERENCED_LIBRARIES = new DataDescriptor<List<Source>>("HtmlEntry.REFERENCED_LIBRARIES");
-  
+
   /**
    * The data descriptor representing the errors resulting from resolving the source.
    */
   static DataDescriptor<List<AnalysisError>> RESOLUTION_ERRORS = new DataDescriptor<List<AnalysisError>>("HtmlEntry.RESOLUTION_ERRORS");
-  
+
   /**
    * The data descriptor representing the resolved AST structure.
    */
   static DataDescriptor<HtmlUnit> RESOLVED_UNIT = new DataDescriptor<HtmlUnit>("HtmlEntry.RESOLVED_UNIT");
-  
+
   /**
    * Return all of the errors associated with the compilation unit that are currently cached.
    * @return all of the errors associated with the compilation unit
    */
   List<AnalysisError> get allErrors;
   HtmlEntryImpl get writableCopy;
 }
-
 /**
  * Instances of the class {@code HtmlEntryImpl} implement an {@link HtmlEntry}.
  * @coverage dart.engine
  */
 class HtmlEntryImpl extends SourceEntryImpl implements HtmlEntry {
-  
+
   /**
    * The state of the cached parsed (but not resolved) HTML unit.
    */
   CacheState _parsedUnitState = CacheState.INVALID;
-  
+
   /**
    * The parsed HTML unit, or {@code null} if the parsed HTML unit is not currently cached.
    */
   HtmlUnit _parsedUnit;
-  
+
   /**
    * The state of the cached resolution errors.
    */
   CacheState _resolutionErrorsState = CacheState.INVALID;
-  
+
   /**
    * The errors produced while resolving the compilation unit, or {@code null} if the errors are not
    * currently cached.
    */
   List<AnalysisError> _resolutionErrors = AnalysisError.NO_ERRORS;
-  
+
   /**
    * The state of the cached parsed and resolved HTML unit.
    */
   CacheState _resolvedUnitState = CacheState.INVALID;
-  
+
   /**
    * The resolved HTML unit, or {@code null} if the resolved HTML unit is not currently cached.
    */
   HtmlUnit _resolvedUnit;
-  
+
   /**
    * The state of the cached list of referenced libraries.
    */
   CacheState _referencedLibrariesState = CacheState.INVALID;
-  
+
   /**
    * The list of libraries referenced in the HTML, or {@code null} if the list is not currently
    * cached. Note that this list does not include libraries defined directly within the HTML file.
    */
   List<Source> _referencedLibraries = Source.EMPTY_ARRAY;
-  
+
   /**
    * The state of the cached HTML element.
    */
   CacheState _elementState = CacheState.INVALID;
-  
+
   /**
    * The element representing the HTML file, or {@code null} if the element is not currently cached.
    */
   HtmlElement _element;
   List<AnalysisError> get allErrors {
     List<AnalysisError> errors = new List<AnalysisError>();
     for (AnalysisError error in _resolutionErrors) {
       errors.add(error);
     }
     if (errors.length == 0) {
@@ skipping 83 matching lines @@
     _referencedLibrariesState = other._referencedLibrariesState;
     _referencedLibraries = other._referencedLibraries;
     _resolutionErrors = other._resolutionErrors;
     _resolutionErrorsState = other._resolutionErrorsState;
     _resolvedUnitState = other._resolvedUnitState;
     _resolvedUnit = other._resolvedUnit;
     _elementState = other._elementState;
     _element = other._element;
   }
 }
-
 /**
  * The interface {@code SourceEntry} defines the behavior of objects that maintain the information
  * cached by an analysis context about an individual source, no matter what kind of source it is.
  * <p>
  * Source entries should be treated as if they were immutable unless a writable copy of the entry
  * has been obtained and has not yet been made visible to other threads.
  * @coverage dart.engine
  */
 abstract class SourceEntry {
-  
+
   /**
    * The data descriptor representing the line information.
    */
   static DataDescriptor<LineInfo> LINE_INFO = new DataDescriptor<LineInfo>("SourceEntry.LINE_INFO");
-  
+
   /**
    * Return the kind of the source, or {@code null} if the kind is not currently cached.
    * @return the kind of the source
    */
   SourceKind get kind;
-  
+
   /**
    * Return the most recent time at which the state of the source matched the state represented by
    * this entry.
    * @return the modification time of this entry
    */
   int get modificationTime;
-  
+
   /**
    * Return the state of the data represented by the given descriptor.
    * @param descriptor the descriptor representing the data whose state is to be returned
    * @return the state of the data represented by the given descriptor
    */
   CacheState getState(DataDescriptor<Object> descriptor);
-  
+
   /**
    * Return the value of the data represented by the given descriptor, or {@code null} if the data
    * represented by the descriptor is not in the cache.
    * @param descriptor the descriptor representing which data is to be returned
    * @return the value of the data represented by the given descriptor
    */
   Object getValue(DataDescriptor descriptor);
-  
+
   /**
    * Return a new entry that is initialized to the same state as this entry but that can be
    * modified.
    * @return a writable copy of this entry
    */
   SourceEntryImpl get writableCopy;
 }
-
 /**
  * Instances of the abstract class {@code SourceEntryImpl} implement the behavior common to all{@link SourceEntry source entries}.
  * @coverage dart.engine
  */
 abstract class SourceEntryImpl implements SourceEntry {
-  
+
   /**
    * The most recent time at which the state of the source matched the state represented by this
    * entry.
    */
   int _modificationTime = 0;
-  
+
   /**
    * The state of the cached line information.
    */
   CacheState _lineInfoState = CacheState.INVALID;
-  
+
   /**
    * The line information computed for the source, or {@code null} if the line information is not
    * currently cached.
    */
   LineInfo _lineInfo;
   int get modificationTime => _modificationTime;
   CacheState getState(DataDescriptor<Object> descriptor) {
     if (identical(descriptor, SourceEntry.LINE_INFO)) {
       return _lineInfoState;
     } else {
       throw new IllegalArgumentException("Invalid descriptor: ${descriptor}");
     }
   }
   Object getValue(DataDescriptor descriptor) {
     if (identical(descriptor, SourceEntry.LINE_INFO)) {
       return _lineInfo as Object;
     } else {
       throw new IllegalArgumentException("Invalid descriptor: ${descriptor}");
     }
   }
-  
+
   /**
    * Set the most recent time at which the state of the source matched the state represented by this
    * entry to the given time.
    * @param time the new modification time of this entry
    */
   void set modificationTime(int time) {
     _modificationTime = time;
   }
-  
+
   /**
    * Set the state of the data represented by the given descriptor to the given state.
    * @param descriptor the descriptor representing the data whose state is to be set
    * @param the new state of the data represented by the given descriptor
    */
   void setState(DataDescriptor<Object> descriptor, CacheState state) {
     if (identical(descriptor, SourceEntry.LINE_INFO)) {
       _lineInfo = updatedValue(state, _lineInfo, null);
       _lineInfoState = state;
     } else {
       throw new IllegalArgumentException("Invalid descriptor: ${descriptor}");
     }
   }
-  
+
   /**
    * Set the value of the data represented by the given descriptor to the given value.
    * @param descriptor the descriptor representing the data whose value is to be set
    * @param value the new value of the data represented by the given descriptor
    */
   void setValue(DataDescriptor descriptor, Object value) {
     if (identical(descriptor, SourceEntry.LINE_INFO)) {
       _lineInfo = value as LineInfo;
       _lineInfoState = CacheState.VALID;
     } else {
       throw new IllegalArgumentException("Invalid descriptor: ${descriptor}");
     }
   }
-  
+
   /**
    * Copy the information from the given cache entry.
    * @param entry the cache entry from which information will be copied
    */
   void copyFrom(SourceEntryImpl entry) {
     _modificationTime = entry._modificationTime;
     _lineInfoState = entry._lineInfoState;
     _lineInfo = entry._lineInfo;
   }
-  
+
   /**
    * Given that some data is being transitioned to the given state, return the value that should be
    * kept in the cache.
    * @param state the state to which the data is being transitioned
    * @param currentValue the value of the data before the transition
    * @param defaultValue the value to be used if the current value is to be removed from the cache
    * @return the value of the data that should be kept in the cache
    */
   Object updatedValue(CacheState state, Object currentValue, Object defaultValue) {
     if (identical(state, CacheState.VALID)) {
       throw new IllegalArgumentException("Use setValue() to set the state to VALID");
     } else if (identical(state, CacheState.IN_PROCESS)) {
       return currentValue;
     }
     return defaultValue;
   }
 }
-
 /**
  * Instances of the class {@code AnalysisContextImpl} implement an {@link AnalysisContext analysis
  * context}.
  * @coverage dart.engine
  */
 class AnalysisContextImpl implements InternalAnalysisContext {
-  
+
   /**
    * The set of analysis options controlling the behavior of this context.
    */
   AnalysisOptions _options = new AnalysisOptionsImpl();
-  
+
   /**
    * The source factory used to create the sources that can be analyzed in this context.
    */
   SourceFactory _sourceFactory;
-  
+
   /**
    * A table mapping the sources known to the context to the information known about the source.
    */
   Map<Source, SourceEntry> _sourceMap = new Map<Source, SourceEntry>();
-  
+
   /**
    * A table mapping sources to the change notices that are waiting to be returned related to that
    * source.
    */
   Map<Source, ChangeNoticeImpl> _pendingNotices = new Map<Source, ChangeNoticeImpl>();
-  
+
   /**
    * A list containing the most recently accessed sources with the most recently used at the end of
    * the list. When more sources are added than the maximum allowed then the least recently used
    * source will be removed and will have it's cached AST structure flushed.
    */
   List<Source> _recentlyUsed = new List<Source>();
-  
+
   /**
    * The object used to synchronize access to all of the caches.
    */
   Object _cacheLock = new Object();
-  
+
   /**
    * The maximum number of sources for which data should be kept in the cache.
    */
   static int _MAX_CACHE_SIZE = 64;
-  
+
   /**
    * The name of the 'src' attribute in a HTML tag.
    */
   static String _ATTRIBUTE_SRC = "src";
-  
+
+  /**
+   * The name of the 'type' attribute in a HTML tag.
+   */
+  static String _ATTRIBUTE_TYPE = "type";
+
   /**
    * The name of the 'script' tag in an HTML file.
    */
   static String _TAG_SCRIPT = "script";
-  
+
+  /**
+   * The value of the 'type' attribute of a 'script' tag that indicates that the script is written
+   * in Dart.
+   */
+  static String _TYPE_DART = "application/dart";
+
   /**
    * The number of times that the flushing of information from the cache has been disabled without
    * being re-enabled.
    */
   int _cacheRemovalCount = 0;
   void addSourceInfo(Source source, SourceEntry info) {
     _sourceMap[source] = info;
   }
   void applyChanges(ChangeSet changeSet) {
     if (changeSet.isEmpty()) {
@@ skipping 133 matching lines @@
         CacheState sourceKindState = dartEntry.getState(DartEntry.SOURCE_KIND);
         if (sourceKindState != CacheState.VALID && sourceKindState != CacheState.ERROR) {
           internalComputeKindOf(source);
           sourceEntry = getSourceEntry(source);
         }
       }
       return sourceEntry.kind;
     }
   }
   LibraryElement computeLibraryElement(Source source) {
-    if (!AnalysisEngine.isDartFileName(source.shortName)) {
-      return null;
-    }
     {
       DartEntry dartEntry = getDartEntry(source);
       if (dartEntry == null) {
         return null;
       }
       LibraryElement element = dartEntry.getValue(DartEntry.ELEMENT);
       if (element == null) {
         LibraryResolver resolver = new LibraryResolver(this);
         try {
           element = resolver.resolveLibrary(source, true);
@@ skipping 452 matching lines @@
   }
   Iterable<Source> sourcesToResolve(List<Source> changedSources) {
     List<Source> librarySources = new List<Source>();
     for (Source source in changedSources) {
       if (identical(computeKindOf(source), SourceKind.LIBRARY)) {
         librarySources.add(source);
       }
     }
     return librarySources;
   }
-  
+
   /**
    * Return a list of the sources that would be processed by {@link #performAnalysisTask()}. This
    * method is intended to be used for testing purposes only.
    * @return a list of the sources that would be processed by {@link #performAnalysisTask()}
    */
   List<Source> get sourcesNeedingProcessing {
     List<Source> sources = new List<Source>();
     {
       for (MapEntry<Source, SourceEntry> entry in getMapEntrySet(_sourceMap)) {
         SourceEntry sourceEntry = entry.getValue();
         if (sourceEntry is DartEntry) {
           DartEntry dartEntry = sourceEntry as DartEntry;
           CacheState parsedUnitState = dartEntry.getState(DartEntry.PARSED_UNIT);
           CacheState elementState = dartEntry.getState(DartEntry.ELEMENT);
           if (identical(parsedUnitState, CacheState.INVALID) || identical(elementState, CacheState.INVALID)) {
             sources.add(entry.getKey());
           }
         } else if (sourceEntry is HtmlEntry) {
           HtmlEntry htmlEntry = sourceEntry as HtmlEntry;
           CacheState parsedUnitState = htmlEntry.getState(HtmlEntry.PARSED_UNIT);
           CacheState resolvedUnitState = htmlEntry.getState(HtmlEntry.RESOLVED_UNIT);
           if (identical(parsedUnitState, CacheState.INVALID) || identical(resolvedUnitState, CacheState.INVALID)) {
             sources.add(entry.getKey());
           }
         }
       }
     }
     return sources;
   }
-  
+
   /**
    * Record that the given source was just accessed for some unspecified purpose.
    * <p>
    * Note: This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source that was accessed
    */
   void accessed(Source source) {
     if (_recentlyUsed.contains(source)) {
       _recentlyUsed.remove(source);
       _recentlyUsed.add(source);
@@ skipping 11 matching lines @@
         DartEntryImpl dartCopy = ((sourceEntry as DartEntry)).writableCopy;
         dartCopy.setState(DartEntry.PARSED_UNIT, CacheState.FLUSHED);
         for (Source librarySource in getLibrariesContaining(source)) {
           dartCopy.setState2(DartEntry.RESOLVED_UNIT, librarySource, CacheState.FLUSHED);
         }
         _sourceMap[removedSource] = dartCopy;
       }
     }
     _recentlyUsed.add(source);
   }
-  
+
   /**
    * Add all of the sources contained in the given source container to the given list of sources.
    * <p>
    * Note: This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param sources the list to which sources are to be added
    * @param container the source container containing the sources to be added to the list
    */
   void addSourcesInContainer(List<Source> sources, SourceContainer container) {
     for (Source source in _sourceMap.keys.toSet()) {
       if (container.contains(source)) {
         sources.add(source);
       }
     }
   }
-  
+
   /**
    * Return {@code true} if the given array of sources contains the given source.
    * @param sources the sources being searched
    * @param targetSource the source being searched for
    * @return {@code true} if the given source is in the array
    */
   bool contains(List<Source> sources, Source targetSource) {
     for (Source source in sources) {
       if (source == targetSource) {
         return true;
       }
     }
     return false;
   }
-  
+
   /**
    * Return {@code true} if the given array of sources contains any of the given target sources.
    * @param sources the sources being searched
    * @param targetSources the sources being searched for
    * @return {@code true} if any of the given target sources are in the array
    */
   bool containsAny(List<Source> sources, List<Source> targetSources) {
     for (Source targetSource in targetSources) {
       if (contains(sources, targetSource)) {
         return true;
       }
     }
     return false;
   }
-  
+
   /**
    * Create a source information object suitable for the given source. Return the source information
    * object that was created, or {@code null} if the source should not be tracked by this context.
    * @param source the source for which an information object is being created
    * @return the source information object that was created
    */
   SourceEntry createSourceEntry(Source source) {
     String name = source.shortName;
     if (AnalysisEngine.isHtmlFileName(name)) {
       HtmlEntry htmlEntry = new HtmlEntryImpl();
       _sourceMap[source] = htmlEntry;
       return htmlEntry;
-    } else if (AnalysisEngine.isDartFileName(name)) {
+    } else {
       DartEntry dartEntry = new DartEntryImpl();
       _sourceMap[source] = dartEntry;
       return dartEntry;
     }
-    return null;
   }
-  
+
   /**
    * Disable flushing information from the cache until {@link #enableCacheRemoval()} has been
    * called.
    */
   void disableCacheRemoval() {
     _cacheRemovalCount++;
   }
-  
+
   /**
    * Re-enable flushing information from the cache.
    */
   void enableCacheRemoval() {
     if (_cacheRemovalCount > 0) {
       _cacheRemovalCount--;
     }
     if (_cacheRemovalCount == 0) {
       while (_recentlyUsed.length >= _MAX_CACHE_SIZE) {
         Source removedSource = _recentlyUsed.removeAt(0);
         SourceEntry sourceEntry = _sourceMap[removedSource];
         if (sourceEntry is HtmlEntry) {
           HtmlEntryImpl htmlCopy = ((sourceEntry as HtmlEntry)).writableCopy;
           htmlCopy.setState(HtmlEntry.PARSED_UNIT, CacheState.FLUSHED);
           htmlCopy.setState(HtmlEntry.RESOLVED_UNIT, CacheState.FLUSHED);
           _sourceMap[removedSource] = htmlCopy;
         } else if (sourceEntry is DartEntry) {
           DartEntryImpl dartCopy = ((sourceEntry as DartEntry)).writableCopy;
           dartCopy.setState(DartEntry.PARSED_UNIT, CacheState.FLUSHED);
           for (Source librarySource in getLibrariesContaining(removedSource)) {
             dartCopy.setState2(DartEntry.RESOLVED_UNIT, librarySource, CacheState.FLUSHED);
           }
           _sourceMap[removedSource] = dartCopy;
         }
       }
     }
   }
-  
+
   /**
    * Search the compilation units that are part of the given library and return the element
    * representing the compilation unit with the given source. Return {@code null} if there is no
    * such compilation unit.
    * @param libraryElement the element representing the library being searched through
    * @param unitSource the source for the compilation unit whose element is to be returned
    * @return the element representing the compilation unit
    */
   CompilationUnitElement find(LibraryElement libraryElement, Source unitSource) {
     CompilationUnitElement element = libraryElement.definingCompilationUnit;
     if (element.source == unitSource) {
       return element;
     }
     for (CompilationUnitElement partElement in libraryElement.parts) {
       if (partElement.source == unitSource) {
         return partElement;
       }
     }
     return null;
   }
-  
+
   /**
    * Return the compilation unit information associated with the given source, or {@code null} if
    * the source is not known to this context. This method should be used to access the compilation
    * unit information rather than accessing the compilation unit map directly because sources in the
    * SDK are implicitly part of every analysis context and are therefore only added to the map when
    * first accessed.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source for which information is being sought
    * @return the compilation unit information associated with the given source
    */
   DartEntry getDartEntry(Source source) {
     SourceEntry sourceEntry = getSourceEntry(source);
     if (sourceEntry == null) {
       sourceEntry = new DartEntryImpl();
       _sourceMap[source] = sourceEntry;
       return sourceEntry as DartEntry;
     } else if (sourceEntry is DartEntry) {
       return sourceEntry as DartEntry;
     }
     return null;
   }
-  
+
   /**
    * Return the HTML unit information associated with the given source, or {@code null} if the
    * source is not known to this context. This method should be used to access the HTML unit
    * information rather than accessing the HTML unit map directly because sources in the SDK are
    * implicitly part of every analysis context and are therefore only added to the map when first
    * accessed.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source for which information is being sought
    * @return the HTML unit information associated with the given source
    */
   HtmlEntry getHtmlEntry(Source source) {
     SourceEntry sourceEntry = getSourceEntry(source);
     if (sourceEntry == null) {
       sourceEntry = new HtmlEntryImpl();
       _sourceMap[source] = sourceEntry;
       return sourceEntry as HtmlEntry;
     } else if (sourceEntry is HtmlEntry) {
       return sourceEntry as HtmlEntry;
     }
     return null;
   }
-  
+
   /**
    * Return the sources of libraries that are referenced in the specified HTML file.
    * @param htmlSource the source of the HTML file being analyzed
    * @param htmlUnit the AST for the HTML file being analyzed
    * @return the sources of libraries that are referenced in the HTML file
    */
   List<Source> getLibrarySources2(Source htmlSource, HtmlUnit htmlUnit) {
     List<Source> libraries = new List<Source>();
     htmlUnit.accept(new RecursiveXmlVisitor_7(this, htmlSource, libraries));
     if (libraries.isEmpty) {
       return Source.EMPTY_ARRAY;
     }
     return new List.from(libraries);
   }
-  
+
   /**
    * Return a change notice for the given source, creating one if one does not already exist.
    * @param source the source for which changes are being reported
    * @return a change notice for the given source
    */
   ChangeNoticeImpl getNotice(Source source) {
     ChangeNoticeImpl notice = _pendingNotices[source];
     if (notice == null) {
       notice = new ChangeNoticeImpl(source);
       _pendingNotices[source] = notice;
     }
     return notice;
   }
-  
+
   /**
    * Return the cache entry associated with the given source, or {@code null} if there is no entry
    * associated with the source.
    * @param source the source for which a cache entry is being sought
    * @return the source cache entry associated with the given source
    */
   SourceEntry getReadableSourceEntry(Source source) {
     {
       return _sourceMap[source];
     }
   }
-  
+
   /**
    * Return the source information associated with the given source, or {@code null} if the source
    * is not known to this context. This method should be used to access the source information
    * rather than accessing the source map directly because sources in the SDK are implicitly part of
    * every analysis context and are therefore only added to the map when first accessed.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source for which information is being sought
    * @return the source information associated with the given source
    */
   SourceEntry getSourceEntry(Source source) {
     SourceEntry sourceEntry = _sourceMap[source];
     if (sourceEntry == null) {
       sourceEntry = createSourceEntry(source);
     }
     return sourceEntry;
   }
-  
+
   /**
    * Return an array containing all of the sources known to this context that have the given kind.
    * @param kind the kind of sources to be returned
    * @return all of the sources known to this context that have the given kind
    */
   List<Source> getSources(SourceKind kind2) {
     List<Source> sources = new List<Source>();
     {
       for (MapEntry<Source, SourceEntry> entry in getMapEntrySet(_sourceMap)) {
         if (identical(entry.getValue().kind, kind2)) {
           sources.add(entry.getKey());
         }
       }
     }
     return new List.from(sources);
   }
-  
+
   /**
    * Return {@code true} if the given compilation unit has a part-of directive but no library
    * directive.
    * @param unit the compilation unit being tested
    * @return {@code true} if the compilation unit has a part-of directive
    */
   bool hasPartOfDirective(CompilationUnit unit) {
     bool hasPartOf = false;
     for (Directive directive in unit.directives) {
       if (directive is PartOfDirective) {
         hasPartOf = true;
       } else if (directive is LibraryDirective) {
         return false;
       }
     }
     return hasPartOf;
   }
-  
+
   /**
    * Compute the kind of the given source. This method should only be invoked when the kind is not
    * already known.
    * @param source the source for which a kind is to be computed
    * @return the new source info that was created to represent the source
    */
   DartEntry internalComputeKindOf(Source source) {
     try {
       accessed(source);
       RecordingErrorListener errorListener = new RecordingErrorListener();
@@ skipping 57 matching lines @@
   AnalysisContextImpl_ScanResult internalScan(Source source, AnalysisErrorListener errorListener) {
     AnalysisContextImpl_ScanResult result = new AnalysisContextImpl_ScanResult();
     Source_ContentReceiver receiver = new Source_ContentReceiver_8(source, errorListener, result);
     try {
       source.getContents(receiver);
     } catch (exception) {
       throw new AnalysisException.con3(exception);
     }
     return result;
   }
-  
+
   /**
    * Invalidate all of the results computed by this context.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    */
   void invalidateAllResults() {
     for (MapEntry<Source, SourceEntry> mapEntry in getMapEntrySet(_sourceMap)) {
       SourceEntry sourceEntry = mapEntry.getValue();
       if (sourceEntry is HtmlEntry) {
         HtmlEntryImpl htmlCopy = ((sourceEntry as HtmlEntry)).writableCopy;
         htmlCopy.setState(HtmlEntry.RESOLVED_UNIT, CacheState.INVALID);
         mapEntry.setValue(htmlCopy);
       } else if (sourceEntry is DartEntry) {
         DartEntryImpl dartCopy = ((sourceEntry as DartEntry)).writableCopy;
         dartCopy.invalidateAllResolutionInformation();
         mapEntry.setValue(dartCopy);
       }
     }
   }
-  
+
   /**
    * In response to a change to at least one of the compilation units in the given library,
    * invalidate any results that are dependent on the result of resolving that library.
    * @param librarySource the source of the library being invalidated
    */
   void invalidateLibraryResolution(Source librarySource) {
     DartEntry libraryEntry = getDartEntry(librarySource);
     if (libraryEntry != null) {
       List<Source> includedParts = libraryEntry.getValue(DartEntry.INCLUDED_PARTS);
       DartEntryImpl libraryCopy = libraryEntry.writableCopy;
       libraryCopy.invalidateAllResolutionInformation();
       libraryCopy.setState(DartEntry.INCLUDED_PARTS, CacheState.INVALID);
       _sourceMap[librarySource] = libraryCopy;
       for (Source unitSource in includedParts) {
         DartEntry partEntry = getDartEntry(unitSource);
         if (partEntry != null) {
           DartEntryImpl dartCopy = partEntry.writableCopy;
           dartCopy.invalidateAllResolutionInformation();
           _sourceMap[unitSource] = dartCopy;
         }
       }
     }
   }
-  
+
   /**
    * Return {@code true} if this library is, or depends on, dart:html.
    * @param library the library being tested
    * @param visitedLibraries a collection of the libraries that have been visited, used to prevent
    * infinite recursion
    * @return {@code true} if this library is, or depends on, dart:html
    */
   bool isClient(LibraryElement library, Source htmlSource, Set<LibraryElement> visitedLibraries) {
     if (visitedLibraries.contains(library)) {
       return false;
     }
     if (library.source == htmlSource) {
       return true;
     }
     javaSetAdd(visitedLibraries, library);
     for (LibraryElement imported in library.importedLibraries) {
       if (isClient(imported, htmlSource, visitedLibraries)) {
         return true;
       }
     }
     for (LibraryElement exported in library.exportedLibraries) {
       if (isClient(exported, htmlSource, visitedLibraries)) {
         return true;
       }
     }
     return false;
   }
-  
+
   /**
    * Perform a single analysis task.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @return {@code true} if work was done, implying that there might be more work to be done
    */
   bool performSingleAnalysisTask() {
     for (MapEntry<Source, SourceEntry> entry in getMapEntrySet(_sourceMap)) {
       SourceEntry sourceEntry = entry.getValue();
       if (sourceEntry is DartEntry) {
@@ skipping 53 matching lines @@
             htmlCopy.setState(HtmlEntry.RESOLVED_UNIT, CacheState.ERROR);
             entry.setValue(htmlCopy);
             AnalysisEngine.instance.logger.logError2("Could not resolve ${entry.getKey().fullName}", exception);
           }
           return true;
         }
       }
     }
     return false;
   }
-  
+
   /**
    * Given a cache entry and a library element, record the library element and other information
    * gleaned from the element in the cache entry.
    * @param dartCopy the cache entry in which data is to be recorded
    * @param library the library element used to record information
    * @param htmlSource the source for the HTML library
    */
   void recordElementData(DartEntryImpl dartCopy, LibraryElement library, Source htmlSource) {
     dartCopy.setValue(DartEntry.ELEMENT, library);
     dartCopy.setValue(DartEntry.IS_LAUNCHABLE, library.entryPoint != null);
     dartCopy.setValue(DartEntry.IS_CLIENT, isClient(library, htmlSource, new Set<LibraryElement>()));
     List<Source> unitSources = new List<Source>();
     unitSources.add(library.definingCompilationUnit.source);
     for (CompilationUnitElement part in library.parts) {
       Source partSource = part.source;
       unitSources.add(partSource);
     }
     dartCopy.setValue(DartEntry.INCLUDED_PARTS, new List.from(unitSources));
   }
-  
+
   /**
    * Record the result of using the given resolver to resolve one or more libraries.
    * @param resolver the resolver that has the needed results
    * @throws AnalysisException if the results cannot be retrieved for some reason
    */
   void recordResolutionResults(LibraryResolver resolver) {
     Source htmlSource = _sourceFactory.forUri(DartSdk.DART_HTML);
     RecordingErrorListener errorListener2 = resolver.errorListener;
     for (Library library in resolver.resolvedLibraries) {
       Source librarySource2 = library.librarySource;
@@ skipping 38 matching lines @@
   }
   HtmlScanResult scanHtml(Source source) {
     HtmlScanner scanner = new HtmlScanner(source);
     try {
       source.getContents(scanner);
     } catch (exception) {
       throw new AnalysisException.con3(exception);
     }
     return scanner.result;
   }
-  
+
   /**
    * Create an entry for the newly added source. Return {@code true} if the new source is a Dart
    * file.
    * <p>
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source that has been added
    * @return {@code true} if the new source is a Dart file
    */
   bool sourceAvailable(Source source) {
     SourceEntry sourceEntry = _sourceMap[source];
     if (sourceEntry == null) {
       sourceEntry = createSourceEntry(source);
     }
     return sourceEntry is DartEntry;
   }
-  
+
   /**
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source that has been changed
    */
   void sourceChanged(Source source) {
     SourceEntry sourceEntry = _sourceMap[source];
     if (sourceEntry is HtmlEntry) {
       HtmlEntryImpl htmlCopy = ((sourceEntry as HtmlEntry)).writableCopy;
       htmlCopy.setState(HtmlEntry.ELEMENT, CacheState.INVALID);
       htmlCopy.setState(SourceEntry.LINE_INFO, CacheState.INVALID);
       htmlCopy.setState(HtmlEntry.PARSED_UNIT, CacheState.INVALID);
       htmlCopy.setState(HtmlEntry.REFERENCED_LIBRARIES, CacheState.INVALID);
       htmlCopy.setState(HtmlEntry.RESOLVED_UNIT, CacheState.INVALID);
       _sourceMap[source] = htmlCopy;
     } else if (sourceEntry is DartEntry) {
       List<Source> containingLibraries = getLibrariesContaining(source);
       DartEntryImpl dartCopy = ((sourceEntry as DartEntry)).writableCopy;
       dartCopy.setState(SourceEntry.LINE_INFO, CacheState.INVALID);
       dartCopy.setState(DartEntry.PARSE_ERRORS, CacheState.INVALID);
       dartCopy.setState(DartEntry.PARSED_UNIT, CacheState.INVALID);
       dartCopy.setState(DartEntry.SOURCE_KIND, CacheState.INVALID);
       _sourceMap[source] = dartCopy;
       invalidateLibraryResolution(source);
       for (Source librarySource in containingLibraries) {
         invalidateLibraryResolution(librarySource);
       }
     }
   }
-  
+
   /**
    * <b>Note:</b> This method must only be invoked while we are synchronized on {@link #cacheLock}.
    * @param source the source that has been deleted
    */
   void sourceRemoved(Source source) {
     DartEntry dartEntry = getDartEntry(source);
     if (dartEntry != null) {
       Set<Source> libraries = new Set<Source>();
       for (Source librarySource in getLibrariesContaining(source)) {
         javaSetAdd(libraries, librarySource);
         for (Source dependentLibrary in getLibrariesDependingOn(librarySource)) {
           javaSetAdd(libraries, dependentLibrary);
         }
       }
       for (Source librarySource in libraries) {
         invalidateLibraryResolution(librarySource);
       }
     }
     _sourceMap.remove(source);
   }
 }
-
 /**
  * Instances of the class {@code ScanResult} represent the results of scanning a source.
  */
 class AnalysisContextImpl_ScanResult {
-  
+
   /**
    * The time at which the contents of the source were last set.
    */
   int _modificationTime = 0;
-  
+
   /**
    * The first token in the token stream.
    */
   Token _token;
-  
+
   /**
    * The line start information that was produced.
    */
   List<int> _lineStarts;
 }
 class Source_ContentReceiver_6 implements Source_ContentReceiver {
   List<CharSequence> contentHolder;
   Source_ContentReceiver_6(this.contentHolder);
   void accept(CharBuffer contents, int modificationTime) {
     contentHolder[0] = contents;
   }
   void accept2(String contents, int modificationTime) {
     contentHolder[0] = new CharSequence(contents);
   }
 }
 class RecursiveXmlVisitor_7 extends RecursiveXmlVisitor<Object> {
   final AnalysisContextImpl AnalysisContextImpl_this;
   Source htmlSource;
   List<Source> libraries;
   RecursiveXmlVisitor_7(this.AnalysisContextImpl_this, this.htmlSource, this.libraries) : super();
   Object visitXmlTagNode(XmlTagNode node) {
     if (javaStringEqualsIgnoreCase(node.tag.lexeme, AnalysisContextImpl._TAG_SCRIPT)) {
+      bool isDartScript = false;
+      XmlAttributeNode scriptAttribute = null;
       for (XmlAttributeNode attribute in node.attributes) {
         if (javaStringEqualsIgnoreCase(attribute.name.lexeme, AnalysisContextImpl._ATTRIBUTE_SRC)) {
-          try {
-            Uri uri = new Uri(path: attribute.text);
-            String fileName = uri.path;
-            if (AnalysisEngine.isDartFileName(fileName)) {
-              Source librarySource = AnalysisContextImpl_this._sourceFactory.resolveUri(htmlSource, fileName);
-              if (librarySource.exists()) {
-                libraries.add(librarySource);
-              }
-            }
-          } catch (exception) {
-            AnalysisEngine.instance.logger.logError2("Invalid URL ('${attribute.text}') in script tag in '${htmlSource.fullName}'", exception);
+          scriptAttribute = attribute;
+        } else if (javaStringEqualsIgnoreCase(attribute.name.lexeme, AnalysisContextImpl._ATTRIBUTE_TYPE)) {
+          if (javaStringEqualsIgnoreCase(attribute.text, AnalysisContextImpl._TYPE_DART)) {
+            isDartScript = true;
           }
         }
       }
+      if (isDartScript && scriptAttribute != null) {
+        try {
+          Uri uri = new Uri(path: scriptAttribute.text);
+          String fileName = uri.path;
+          Source librarySource = AnalysisContextImpl_this._sourceFactory.resolveUri(htmlSource, fileName);
+          if (librarySource.exists()) {
+            libraries.add(librarySource);
+          }
+        } catch (exception) {
+          AnalysisEngine.instance.logger.logError2("Invalid URL ('${scriptAttribute.text}') in script tag in '${htmlSource.fullName}'", exception);
+        }
+      }
     }
     return super.visitXmlTagNode(node);
   }
 }
 class Source_ContentReceiver_8 implements Source_ContentReceiver {
   Source source;
   AnalysisErrorListener errorListener;
   AnalysisContextImpl_ScanResult result;
   Source_ContentReceiver_8(this.source, this.errorListener, this.result);
   void accept(CharBuffer contents, int modificationTime2) {
     CharBufferScanner scanner = new CharBufferScanner(source, contents, errorListener);
     result._modificationTime = modificationTime2;
     result._token = scanner.tokenize();
     result._lineStarts = scanner.lineStarts;
   }
   void accept2(String contents, int modificationTime2) {
     StringScanner scanner = new StringScanner(source, contents, errorListener);
     result._modificationTime = modificationTime2;
     result._token = scanner.tokenize();
     result._lineStarts = scanner.lineStarts;
   }
 }
-
 /**
  * Instances of the class {@code AnalysisErrorInfoImpl} represent the analysis errors and line info
  * associated with a source.
  */
 class AnalysisErrorInfoImpl implements AnalysisErrorInfo {
-  
+
   /**
    * The analysis errors associated with a source, or {@code null} if there are no errors.
    */
   List<AnalysisError> _errors;
-  
+
   /**
    * The line information associated with the errors, or {@code null} if there are no errors.
    */
   LineInfo _lineInfo;
-  
+
   /**
    * Initialize an newly created error info with the errors and line information
    * @param errors the errors as a result of analysis
    * @param lineinfo the line info for the errors
    */
   AnalysisErrorInfoImpl(List<AnalysisError> errors, LineInfo lineInfo) {
     this._errors = errors;
     this._lineInfo = lineInfo;
   }
-  
+
   /**
    * Return the errors of analysis, or {@code null} if there were no errors.
    * @return the errors as a result of the analysis
    */
   List<AnalysisError> get errors => _errors;
-  
+
   /**
    * Return the line information associated with the errors, or {@code null} if there were no
    * errors.
    * @return the line information associated with the errors
    */
   LineInfo get lineInfo => _lineInfo;
 }
-
 /**
  * Instances of the class {@code AnalysisOptions} represent a set of analysis options used to
  * control the behavior of an analysis context.
  */
 class AnalysisOptionsImpl implements AnalysisOptions {
-  
+
   /**
    * A flag indicating whether analysis is to use strict mode. In strict mode, error reporting is
    * based exclusively on the static type information.
    */
   bool _strictMode = false;
-  
+
   /**
    * Return {@code true} if analysis is to use strict mode. In strict mode, error reporting is based
    * exclusively on the static type information.
    * @return {@code true} if analysis is to use strict mode
    */
   bool get strictMode => _strictMode;
-  
+
   /**
    * Set whether analysis is to use strict mode to the given value. In strict mode, error reporting
    * is based exclusively on the static type information.
    * @param isStrict {@code true} if analysis is to use strict mode
    */
   void set strictMode(bool isStrict) {
     _strictMode = isStrict;
   }
 }
-
 /**
  * The enumeration {@code CacheState} defines the possible states of cached data.
  */
 class CacheState implements Comparable<CacheState> {
-  
+
   /**
    * The data is not in the cache and the last time an attempt was made to compute the data an
    * exception occurred, making it pointless to attempt.
    * <p>
    * Valid Transitions:
    * <ul>
    * <li>{@link #INVALID} if a source was modified that might cause the data to be computable</li>
    * </ul>
    */
   static final CacheState ERROR = new CacheState('ERROR', 0);
-  
+
   /**
    * The data is not in the cache because it was flushed from the cache in order to control memory
    * usage. If the data is recomputed, results do not need to be reported.
    * <p>
    * Valid Transitions:
    * <ul>
    * <li>{@link #IN_PROCESS} if the data is being recomputed</li>
    * <li>{@link #INVALID} if a source was modified that causes the data to need to be recomputed</li>
    * </ul>
    */
   static final CacheState FLUSHED = new CacheState('FLUSHED', 1);
-  
+
   /**
    * The data might or might not be in the cache but is in the process of being recomputed.
    * <p>
    * Valid Transitions:
    * <ul>
    * <li>{@link #ERROR} if an exception occurred while trying to compute the data</li>
    * <li>{@link #VALID} if the data was successfully computed and stored in the cache</li>
    * </ul>
    */
   static final CacheState IN_PROCESS = new CacheState('IN_PROCESS', 2);
-  
+
   /**
    * The data is not in the cache and needs to be recomputed so that results can be reported.
    * <p>
    * Valid Transitions:
    * <ul>
    * <li>{@link #IN_PROCESS} if an attempt is being made to recompute the data</li>
    * </ul>
    */
   static final CacheState INVALID = new CacheState('INVALID', 3);
-  
+
   /**
    * The data is in the cache and up-to-date.
    * <p>
    * Valid Transitions:
    * <ul>
    * <li>{@link #FLUSHED} if the data is removed in order to manage memory usage</li>
    * <li>{@link #INVALID} if a source was modified in such a way as to invalidate the previous data</li>
    * </ul>
    */
   static final CacheState VALID = new CacheState('VALID', 4);
   static final List<CacheState> values = [ERROR, FLUSHED, IN_PROCESS, INVALID, VALID];
-  
+
   /// The name of this enum constant, as declared in the enum declaration.
   final String name;
-  
+
   /// The position in the enum declaration.
   final int ordinal;
   CacheState(this.name, this.ordinal) {
   }
   int compareTo(CacheState other) => ordinal - other.ordinal;
   String toString() => name;
 }
-
 /**
  * Instances of the class {@code ChangeNoticeImpl} represent a change to the analysis results
  * associated with a given source.
  * @coverage dart.engine
  */
 class ChangeNoticeImpl implements ChangeNotice {
-  
+
   /**
    * The source for which the result is being reported.
    */
   Source _source;
-  
+
   /**
    * The fully resolved AST that changed as a result of the analysis, or {@code null} if the AST was
    * not changed.
    */
   CompilationUnit _compilationUnit;
-  
+
   /**
    * The errors that changed as a result of the analysis, or {@code null} if errors were not
    * changed.
    */
   List<AnalysisError> _errors;
-  
+
   /**
    * The line information associated with the source, or {@code null} if errors were not changed.
    */
   LineInfo _lineInfo;
-  
+
   /**
    * An empty array of change notices.
    */
   static List<ChangeNoticeImpl> EMPTY_ARRAY = new List<ChangeNoticeImpl>(0);
-  
+
   /**
    * Initialize a newly created notice associated with the given source.
    * @param source the source for which the change is being reported
    */
   ChangeNoticeImpl(Source source) {
     this._source = source;
   }
-  
+
   /**
    * Return the fully resolved AST that changed as a result of the analysis, or {@code null} if the
    * AST was not changed.
    * @return the fully resolved AST that changed as a result of the analysis
    */
   CompilationUnit get compilationUnit => _compilationUnit;
-  
+
   /**
    * Return the errors that changed as a result of the analysis, or {@code null} if errors were not
    * changed.
    * @return the errors that changed as a result of the analysis
    */
   List<AnalysisError> get errors => _errors;
-  
+
   /**
    * Return the line information associated with the source, or {@code null} if errors were not
    * changed.
    * @return the line information associated with the source
    */
   LineInfo get lineInfo => _lineInfo;
-  
+
   /**
    * Return the source for which the result is being reported.
    * @return the source for which the result is being reported
    */
   Source get source => _source;
-  
+
   /**
    * Set the fully resolved AST that changed as a result of the analysis to the given AST.
    * @param compilationUnit the fully resolved AST that changed as a result of the analysis
    */
   void set compilationUnit(CompilationUnit compilationUnit2) {
     this._compilationUnit = compilationUnit2;
   }
-  
+
   /**
    * Set the errors that changed as a result of the analysis to the given errors and set the line
    * information to the given line information.
    * @param errors the errors that changed as a result of the analysis
    * @param lineInfo the line information associated with the source
    */
   void setErrors(List<AnalysisError> errors2, LineInfo lineInfo2) {
     this._errors = errors2;
     this._lineInfo = lineInfo2;
   }
 }
-
 /**
  * Instances of the class {@code DelegatingAnalysisContextImpl} extend {@link AnalysisContextImplanalysis context} to delegate sources to the appropriate analysis context. For instance, if the
  * source is in a system library then the analysis context from the {@link DartSdk} is used.
  * @coverage dart.engine
  */
 class DelegatingAnalysisContextImpl extends AnalysisContextImpl {
-  
+
   /**
    * This references the {@link InternalAnalysisContext} held onto by the {@link DartSdk} which is
    * used (instead of this {@link AnalysisContext}) for SDK sources. This field is set when
    * #setSourceFactory(SourceFactory) is called, and references the analysis context in the{@link DartUriResolver} in the {@link SourceFactory}, this analysis context assumes that there
    * will be such a resolver.
    */
   InternalAnalysisContext _sdkAnalysisContext;
   void addSourceInfo(Source source, SourceEntry info) {
     if (source.isInSystemLibrary()) {
       _sdkAnalysisContext.addSourceInfo(source, info);
@@ skipping 203 matching lines @@
       _sdkAnalysisContext = sdk.context as InternalAnalysisContext;
       if (_sdkAnalysisContext is DelegatingAnalysisContextImpl) {
         _sdkAnalysisContext = null;
         throw new IllegalStateException("The context provided by an SDK cannot itself be a delegating analysis context");
       }
     } else {
       throw new IllegalStateException("SourceFactorys provided to DelegatingAnalysisContextImpls must have a DartSdk associated with the provided SourceFactory.");
     }
   }
 }
-
 /**
  * Instances of the class {@code InstrumentedAnalysisContextImpl} implement an{@link AnalysisContext analysis context} by recording instrumentation data and delegating to
  * another analysis context to do the non-instrumentation work.
  * @coverage dart.engine
  */
 class InstrumentedAnalysisContextImpl implements InternalAnalysisContext {
-  
+
   /**
    * Record an exception that was thrown during analysis.
    * @param instrumentation the instrumentation builder being used to record the exception
    * @param exception the exception being reported
    */
   static void recordAnalysisException(InstrumentationBuilder instrumentation, AnalysisException exception) {
     instrumentation.record(exception);
   }
-  
+
   /**
    * The unique identifier used to identify this analysis context in the instrumentation data.
    */
   String _contextId = UUID.randomUUID().toString();
-  
+
   /**
    * The analysis context to which all of the non-instrumentation work is delegated.
    */
   InternalAnalysisContext _basis;
-  
+
   /**
    * Create a new {@link InstrumentedAnalysisContextImpl} which wraps a new{@link AnalysisContextImpl} as the basis context.
    */
   InstrumentedAnalysisContextImpl() {
-    _jtd_constructor_182_impl();
+    _jtd_constructor_183_impl();
   }
-  _jtd_constructor_182_impl() {
-    _jtd_constructor_183_impl(new AnalysisContextImpl());
+  _jtd_constructor_183_impl() {
+    _jtd_constructor_184_impl(new AnalysisContextImpl());
   }
-  
+
   /**
    * Create a new {@link InstrumentedAnalysisContextImpl} with a specified basis context, aka the
    * context to wrap and instrument.
    * @param context some {@link InstrumentedAnalysisContext} to wrap and instrument
    */
   InstrumentedAnalysisContextImpl.con1(InternalAnalysisContext context) {
-    _jtd_constructor_183_impl(context);
+    _jtd_constructor_184_impl(context);
   }
-  _jtd_constructor_183_impl(InternalAnalysisContext context) {
+  _jtd_constructor_184_impl(InternalAnalysisContext context) {
     _basis = context;
   }
   void addSourceInfo(Source source, SourceEntry info) {
     _basis.addSourceInfo(source, info);
   }
   void applyChanges(ChangeSet changeSet) {
     InstrumentationBuilder instrumentation = Instrumentation.builder2("Analysis-applyChanges");
     try {
       instrumentation.metric3("contextId", _contextId);
       _basis.applyChanges(changeSet);
@@ skipping 81 matching lines @@
   InternalAnalysisContext extractContextInto(SourceContainer container, InternalAnalysisContext newContext) => _basis.extractContextInto(container, newContext);
   AnalysisOptions get analysisOptions {
     InstrumentationBuilder instrumentation = Instrumentation.builder2("Analysis-getAnalysisOptions");
     try {
       instrumentation.metric3("contextId", _contextId);
       return _basis.analysisOptions;
     } finally {
       instrumentation.log();
     }
   }
-  
+
   /**
    * @return the underlying {@link AnalysisContext}.
    */
   AnalysisContext get basis => _basis;
   Element getElement(ElementLocation location) {
     InstrumentationBuilder instrumentation = Instrumentation.builder2("Analysis-getElement");
     try {
       instrumentation.metric3("contextId", _contextId);
       return _basis.getElement(location);
     } finally {
@@ skipping 305 matching lines @@
   Iterable<Source> sourcesToResolve(List<Source> changedSources) {
     InstrumentationBuilder instrumentation = Instrumentation.builder2("Analysis-sourcesToResolve");
     try {
       instrumentation.metric3("contextId", _contextId);
       return _basis.sourcesToResolve(changedSources);
     } finally {
       instrumentation.log();
     }
   }
 }
-
 /**
  * The interface {@code InternalAnalysisContext} defines additional behavior for an analysis context
  * that is required by internal users of the context.
  */
 abstract class InternalAnalysisContext implements AnalysisContext {
-  
+
   /**
    * Add the given source with the given information to this context.
    * @param source the source to be added
    * @param info the information about the source
    */
   void addSourceInfo(Source source, SourceEntry info);
-  
+
   /**
    * Return an AST structure corresponding to the given source, but ensure that the structure has
    * not already been resolved and will not be resolved by any other threads or in any other
    * library.
    * @param source the compilation unit for which an AST structure should be returned
    * @return the AST structure representing the content of the source
    * @throws AnalysisException if the analysis could not be performed
    */
   CompilationUnit computeResolvableCompilationUnit(Source source);
-  
+
   /**
    * Initialize the specified context by removing the specified sources from the receiver and adding
    * them to the specified context.
    * @param container the container containing sources that should be removed from this context and
    * added to the returned context
    * @param newContext the context to be initialized
    * @return the analysis context that was initialized
    */
   InternalAnalysisContext extractContextInto(SourceContainer container, InternalAnalysisContext newContext);
-  
+
   /**
    * Return a namespace containing mappings for all of the public names defined by the given
    * library.
    * @param library the library whose public namespace is to be returned
    * @return the public namespace of the given library
    */
   Namespace getPublicNamespace(LibraryElement library);
-  
+
   /**
    * Return a namespace containing mappings for all of the public names defined by the library
    * defined by the given source.
    * @param source the source defining the library whose public namespace is to be returned
    * @return the public namespace corresponding to the library defined by the given source
    * @throws AnalysisException if the public namespace could not be computed
    */
   Namespace getPublicNamespace2(Source source);
-  
+
   /**
    * Given a table mapping the source for the libraries represented by the corresponding elements to
    * the elements representing the libraries, record those mappings.
    * @param elementMap a table mapping the source for the libraries represented by the elements to
    * the elements representing the libraries
    */
   void recordLibraryElements(Map<Source, LibraryElement> elementMap);
 }
-
 /**
  * Instances of the class {@code RecordingErrorListener} implement an error listener that will
  * record the errors that are reported to it in a way that is appropriate for caching those errors
  * within an analysis context.
  * @coverage dart.engine
  */
 class RecordingErrorListener implements AnalysisErrorListener {
-  
+
   /**
    * A HashMap of lists containing the errors that were collected, keyed by each {@link Source}.
    */
   Map<Source, List<AnalysisError>> _errors = new Map<Source, List<AnalysisError>>();
-  
+
   /**
    * Add all of the errors recorded by the given listener to this listener.
    * @param listener the listener that has recorded the errors to be added
    */
   void addAll(RecordingErrorListener listener) {
     for (AnalysisError error in listener.errors) {
       onError(error);
     }
   }
-  
+
   /**
    * Answer the errors collected by the listener.
    * @return an array of errors (not {@code null}, contains no {@code null}s)
    */
   List<AnalysisError> get errors {
     Set<MapEntry<Source, List<AnalysisError>>> entrySet2 = getMapEntrySet(_errors);
     if (entrySet2.length == 0) {
       return AnalysisError.NO_ERRORS;
     }
     List<AnalysisError> resultList = new List<AnalysisError>();
     for (MapEntry<Source, List<AnalysisError>> entry in entrySet2) {
       resultList.addAll(entry.getValue());
     }
     return new List.from(resultList);
   }
-  
+
   /**
    * Answer the errors collected by the listener for some passed {@link Source}.
    * @param source some {@link Source} for which the caller wants the set of {@link AnalysisError}s
    * collected by this listener
    * @return the errors collected by the listener for the passed {@link Source}
    */
   List<AnalysisError> getErrors2(Source source) {
     List<AnalysisError> errorsForSource = _errors[source];
     if (errorsForSource == null) {
       return AnalysisError.NO_ERRORS;
     } else {
       return new List.from(errorsForSource);
     }
   }
   void onError(AnalysisError event) {
     Source source2 = event.source;
     List<AnalysisError> errorsForSource = _errors[source2];
     if (_errors[source2] == null) {
       errorsForSource = new List<AnalysisError>();
       _errors[source2] = errorsForSource;
     }
     errorsForSource.add(event);
   }
 }
-
 /**
  * Instances of the class {@code ResolutionEraser} remove any resolution information from an AST
  * structure when used to visit that structure.
  */
 class ResolutionEraser extends GeneralizingASTVisitor<Object> {
   Object visitAssignmentExpression(AssignmentExpression node) {
     node.element = null;
     return super.visitAssignmentExpression(node);
   }
   Object visitBinaryExpression(BinaryExpression node) {
@@ skipping 51 matching lines @@
   }
   Object visitSimpleIdentifier(SimpleIdentifier node) {
     node.element = null;
     return super.visitSimpleIdentifier(node);
   }
   Object visitSuperConstructorInvocation(SuperConstructorInvocation node) {
     node.element = null;
     return super.visitSuperConstructorInvocation(node);
   }
 }
-
 /**
  * The interface {@code Logger} defines the behavior of objects that can be used to receive
  * information about errors within the analysis engine. Implementations usually write this
  * information to a file, but can also record the information for later use (such as during testing)
  * or even ignore the information.
  * @coverage dart.engine.utilities
  */
 abstract class Logger {
   static Logger NULL = new Logger_NullLogger();
-  
+
   /**
    * Log the given message as an error.
    * @param message an explanation of why the error occurred or what it means
    */
   void logError(String message);
-  
+
   /**
    * Log the given exception as one representing an error.
    * @param message an explanation of why the error occurred or what it means
    * @param exception the exception being logged
    */
   void logError2(String message, Exception exception);
-  
+
   /**
    * Log the given exception as one representing an error.
    * @param exception the exception being logged
    */
   void logError3(Exception exception);
-  
+
   /**
    * Log the given informational message.
    * @param message an explanation of why the error occurred or what it means
    * @param exception the exception being logged
    */
   void logInformation(String message);
-  
+
   /**
    * Log the given exception as one representing an informational message.
    * @param message an explanation of why the error occurred or what it means
    * @param exception the exception being logged
    */
   void logInformation2(String message, Exception exception);
 }
-
 /**
  * Implementation of {@link Logger} that does nothing.
  */
 class Logger_NullLogger implements Logger {
   void logError(String message) {
   }
   void logError2(String message, Exception exception) {
   }
   void logError3(Exception exception) {
   }
   void logInformation(String message) {
   }
   void logInformation2(String message, Exception exception) {
   }
 }