Remove dead code related to the diagnostics server.

pkg/analysis_server/lib/src/status/get_handler.dart

Index: pkg/analysis_server/lib/src/status/get_handler.dart
diff --git a/pkg/analysis_server/lib/src/status/get_handler.dart b/pkg/analysis_server/lib/src/status/get_handler.dart
deleted file mode 100644
index e73525aa7c3afe2bf24f229e3485333de1b98377..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/status/get_handler.dart
+++ /dev/null
@@ -1,2746 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'dart:collection';
-import 'dart:convert';
-import 'dart:io';
-import 'dart:math';
-
-import 'package:analysis_server/protocol/protocol.dart';
-import 'package:analysis_server/protocol/protocol_generated.dart';
-import 'package:analysis_server/src/analysis_server.dart';
-import 'package:analysis_server/src/domain_completion.dart';
-import 'package:analysis_server/src/domain_diagnostic.dart';
-import 'package:analysis_server/src/domain_execution.dart';
-import 'package:analysis_server/src/operation/operation.dart';
-import 'package:analysis_server/src/operation/operation_analysis.dart';
-import 'package:analysis_server/src/operation/operation_queue.dart';
-import 'package:analysis_server/src/server/http_server.dart';
-import 'package:analysis_server/src/services/completion/completion_performance.dart';
-import 'package:analysis_server/src/socket_server.dart';
-import 'package:analysis_server/src/status/ast_writer.dart';
-import 'package:analysis_server/src/status/element_writer.dart';
-import 'package:analysis_server/src/status/memory_use.dart';
-import 'package:analysis_server/src/status/validator.dart';
-import 'package:analysis_server/src/utilities/average.dart';
-import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/dart/element/element.dart';
-import 'package:analyzer/dart/element/visitor.dart';
-import 'package:analyzer/exception/exception.dart';
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/source/error_processor.dart';
-import 'package:analyzer/source/sdk_ext.dart';
-import 'package:analyzer/src/context/cache.dart';
-import 'package:analyzer/src/context/context.dart' show AnalysisContextImpl;
-import 'package:analyzer/src/context/source.dart';
-import 'package:analyzer/src/dart/sdk/sdk.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/resolver.dart';
-import 'package:analyzer/src/generated/sdk.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/generated/utilities_collection.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
-import 'package:analyzer/src/services/lint.dart';
-import 'package:analyzer/src/task/dart.dart';
-import 'package:analyzer/src/task/driver.dart';
-import 'package:analyzer/src/task/html.dart';
-import 'package:analyzer/src/task/options.dart';
-import 'package:analyzer/task/dart.dart';
-import 'package:analyzer/task/general.dart';
-import 'package:analyzer/task/html.dart';
-import 'package:analyzer/task/model.dart';
-import 'package:plugin/plugin.dart';
-
-/**
- * A function that can be used to generate HTML output into the given [buffer].
- * The HTML that is generated must be valid (special characters must already be
- * encoded).
- */
-typedef void HtmlGenerator(StringBuffer buffer);
-
-class ElementCounter extends RecursiveElementVisitor {
-  Map<Type, int> counts = new HashMap<Type, int>();
-  int elementsWithDocs = 0;
-  int totalDocSpan = 0;
-
-  void visit(Element element) {
-    String comment = element.documentationComment;
-    if (comment != null) {
-      ++elementsWithDocs;
-      totalDocSpan += comment.length;
-    }
-
-    Type type = element.runtimeType;
-    if (counts[type] == null) {
-      counts[type] = 1;
-    } else {
-      counts[type]++;
-    }
-  }
-
-  @override
-  visitClassElement(ClassElement element) {
-    visit(element);
-    super.visitClassElement(element);
-  }
-
-  @override
-  visitCompilationUnitElement(CompilationUnitElement element) {
-    visit(element);
-    super.visitCompilationUnitElement(element);
-  }
-
-  @override
-  visitConstructorElement(ConstructorElement element) {
-    visit(element);
-    super.visitConstructorElement(element);
-  }
-
-  @override
-  visitExportElement(ExportElement element) {
-    visit(element);
-    super.visitExportElement(element);
-  }
-
-  @override
-  visitFieldElement(FieldElement element) {
-    visit(element);
-    super.visitFieldElement(element);
-  }
-
-  @override
-  visitFieldFormalParameterElement(FieldFormalParameterElement element) {
-    visit(element);
-    super.visitFieldFormalParameterElement(element);
-  }
-
-  @override
-  visitFunctionElement(FunctionElement element) {
-    visit(element);
-    super.visitFunctionElement(element);
-  }
-
-  @override
-  visitFunctionTypeAliasElement(FunctionTypeAliasElement element) {
-    visit(element);
-    super.visitFunctionTypeAliasElement(element);
-  }
-
-  @override
-  visitImportElement(ImportElement element) {
-    visit(element);
-    super.visitImportElement(element);
-  }
-
-  @override
-  visitLabelElement(LabelElement element) {
-    visit(element);
-    super.visitLabelElement(element);
-  }
-
-  @override
-  visitLibraryElement(LibraryElement element) {
-    visit(element);
-    super.visitLibraryElement(element);
-  }
-
-  @override
-  visitLocalVariableElement(LocalVariableElement element) {
-    visit(element);
-    super.visitLocalVariableElement(element);
-  }
-
-  @override
-  visitMethodElement(MethodElement element) {
-    visit(element);
-    super.visitMethodElement(element);
-  }
-
-  @override
-  visitMultiplyDefinedElement(MultiplyDefinedElement element) {
-    visit(element);
-    super.visitMultiplyDefinedElement(element);
-  }
-
-  @override
-  visitParameterElement(ParameterElement element) {
-    visit(element);
-    super.visitParameterElement(element);
-  }
-
-  @override
-  visitPrefixElement(PrefixElement element) {
-    visit(element);
-    super.visitPrefixElement(element);
-  }
-
-  @override
-  visitPropertyAccessorElement(PropertyAccessorElement element) {
-    visit(element);
-    super.visitPropertyAccessorElement(element);
-  }
-
-  @override
-  visitTopLevelVariableElement(TopLevelVariableElement element) {
-    visit(element);
-    super.visitTopLevelVariableElement(element);
-  }
-
-  @override
-  visitTypeParameterElement(TypeParameterElement element) {
-    visit(element);
-    super.visitTypeParameterElement(element);
-  }
-}
-
-/**
- * Instances of the class [GetHandler] handle GET requests.
- */
-class GetHandler implements AbstractGetHandler {
-  /**
-   * The path used to request overall performance information.
-   */
-  static const String ANALYSIS_PERFORMANCE_PATH = '/perf/analysis';
-
-  /**
-   * The path used to request information about a element model.
-   */
-  static const String AST_PATH = '/ast';
-
-  /**
-   * The path used to request information about the cache entry corresponding
-   * to a single file.
-   */
-  static const String CACHE_ENTRY_PATH = '/cache_entry';
-
-  /**
-   * The path used to request the list of source files in a certain cache
-   * state.
-   */
-  static const String CACHE_STATE_PATH = '/cache_state';
-
-  /**
-   * The path used to request code completion information.
-   */
-  static const String COMPLETION_PATH = '/completion';
-
-  /**
-   * The path used to request communication performance information.
-   */
-  static const String COMMUNICATION_PERFORMANCE_PATH = '/perf/communication';
-
-  /**
-   * The path used to request diagnostic information for a single context.
-   */
-  static const String CONTEXT_DIAGNOSTICS_PATH = '/diagnostic/context';
-
-  /**
-   * The path used to request running a validation report for a single context.
-   */
-  static const String CONTEXT_VALIDATION_DIAGNOSTICS_PATH =
-      '/diagnostic/contextValidation';
-
-  /**
-   * The path used to request information about a specific context.
-   */
-  static const String CONTEXT_PATH = '/context';
-
-  /**
-   * The path used to request diagnostic information.
-   */
-  static const String DIAGNOSTIC_PATH = '/diagnostic';
-
-  /**
-   * The path used to request information about a element model.
-   */
-  static const String ELEMENT_PATH = '/element';
-
-  /**
-   * The path used to request an analysis of the memory use of the analyzer.
-   */
-  static const String MEMORY_USE_PATH = '/memoryUse';
-
-  /**
-   * The path used to request an overlay contents.
-   */
-  static const String OVERLAY_PATH = '/overlay';
-
-  /**
-   * The path used to request overlays information.
-   */
-  static const String OVERLAYS_PATH = '/overlays';
-
-  /**
-   * The path used to request the status of the analysis server as a whole.
-   */
-  static const String STATUS_PATH = '/status';
-
-  /**
-   * Query parameter used to represent the context to search for, when
-   * accessing [CACHE_ENTRY_PATH] or [CACHE_STATE_PATH].
-   */
-  static const String CONTEXT_QUERY_PARAM = 'context';
-
-  /**
-   * Query parameter used to represent the descriptor to search for, when
-   * accessing [CACHE_STATE_PATH].
-   */
-  static const String DESCRIPTOR_QUERY_PARAM = 'descriptor';
-
-  /**
-   * Query parameter used to represent the name of elements to search for, when
-   * accessing [INDEX_ELEMENT_BY_NAME].
-   */
-  static const String INDEX_ELEMENT_NAME = 'name';
-
-  /**
-   * Query parameter used to represent the path of an overlayed file.
-   */
-  static const String PATH_PARAM = 'path';
-
-  /**
-   * Query parameter used to represent the source to search for, when accessing
-   * [CACHE_ENTRY_PATH].
-   */
-  static const String SOURCE_QUERY_PARAM = 'entry';
-
-  /**
-   * Query parameter used to represent the cache state to search for, when
-   * accessing [CACHE_STATE_PATH].
-   */
-  static const String STATE_QUERY_PARAM = 'state';
-
-  static final ContentType _htmlContent =
-      new ContentType("text", "html", charset: "utf-8");
-
-  /**
-   * Rolling average of calls to get diagnostics.
-   */
-  Average _diagnosticCallAverage = new Average();
-
-  /**
-   * The socket server whose status is to be reported on.
-   */
-  SocketServer _server;
-
-  /**
-   * Buffer containing strings printed by the analysis server.
-   */
-  List<String> _printBuffer;
-
-  /**
-   * Contents of overlay files.
-   */
-  final Map<String, String> _overlayContents = <String, String>{};
-
-  /**
-   * Handler for diagnostics requests.
-   */
-  DiagnosticDomainHandler _diagnosticHandler;
-
-  /**
-   * Initialize a newly created handler for GET requests.
-   */
-  GetHandler(this._server, this._printBuffer);
-
-  DiagnosticDomainHandler get diagnosticHandler {
-    if (_diagnosticHandler == null) {
-      _diagnosticHandler = new DiagnosticDomainHandler(_server.analysisServer);
-    }
-    return _diagnosticHandler;
-  }
-
-  /**
-   * Return the active [CompletionDomainHandler]
-   * or `null` if either analysis server is not running
-   * or there is no completion domain handler.
-   */
-  CompletionDomainHandler get _completionDomainHandler {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return null;
-    }
-    return analysisServer.handlers
-        .firstWhere((h) => h is CompletionDomainHandler, orElse: () => null);
-  }
-
-  /**
-   * Handle a GET request received by the HTTP server.
-   */
-  void handleGetRequest(HttpRequest request) {
-    String path = request.uri.path;
-    if (path == '/' || path == STATUS_PATH) {
-      _returnServerStatus(request);
-    } else if (path == ANALYSIS_PERFORMANCE_PATH) {
-      _returnAnalysisPerformance(request);
-    } else if (path == AST_PATH) {
-      _returnAst(request);
-    } else if (path == CACHE_STATE_PATH) {
-      _returnCacheState(request);
-    } else if (path == CACHE_ENTRY_PATH) {
-      _returnCacheEntry(request);
-    } else if (path == COMPLETION_PATH) {
-      _returnCompletionInfo(request);
-    } else if (path == COMMUNICATION_PERFORMANCE_PATH) {
-      _returnCommunicationPerformance(request);
-    } else if (path == CONTEXT_DIAGNOSTICS_PATH) {
-      _returnContextDiagnostics(request);
-    } else if (path == CONTEXT_VALIDATION_DIAGNOSTICS_PATH) {
-      _returnContextValidationDiagnostics(request);
-    } else if (path == CONTEXT_PATH) {
-      _returnContextInfo(request);
-    } else if (path == DIAGNOSTIC_PATH) {
-      _returnDiagnosticInfo(request);
-    } else if (path == ELEMENT_PATH) {
-      _returnElement(request);
-    } else if (path == MEMORY_USE_PATH) {
-      _returnMemoryUsage(request);
-    } else if (path == OVERLAY_PATH) {
-      _returnOverlayContents(request);
-    } else if (path == OVERLAYS_PATH) {
-      _returnOverlaysInfo(request);
-    } else {
-      _returnUnknownRequest(request);
-    }
-  }
-
-  /**
-   * Produce an encoded version of the given [descriptor] that can be used to
-   * find the descriptor later.
-   */
-  String _encodeSdkDescriptor(SdkDescription descriptor) {
-    StringBuffer buffer = new StringBuffer();
-    buffer.write(descriptor.options.signature.join(','));
-    for (String path in descriptor.paths) {
-      buffer.write('+');
-      buffer.write(path);
-    }
-    return buffer.toString();
-  }
-
-  /**
-   * Return the folder being managed by the given [analysisServer] that matches
-   * the given [contextFilter], or `null` if there is none.
-   */
-  Folder _findFolder(AnalysisServer analysisServer, String contextFilter) {
-    return analysisServer.folderMap.keys.firstWhere(
-        (Folder folder) => folder.path == contextFilter,
-        orElse: () => null);
-  }
-
-  /**
-   * Return any AST structure stored in the given [entry].
-   */
-  CompilationUnit _getAnyAst(CacheEntry entry) {
-    CompilationUnit unit = entry.getValue(PARSED_UNIT);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT1);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT2);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT3);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT4);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT5);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT6);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT7);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT8);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT9);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT10);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT11);
-    if (unit != null) {
-      return unit;
-    }
-    unit = entry.getValue(RESOLVED_UNIT12);
-    if (unit != null) {
-      return unit;
-    }
-    return entry.getValue(RESOLVED_UNIT);
-  }
-
-  /**
-   * Return a list of the result descriptors whose state should be displayed for
-   * the given cache [entry].
-   */
-  List<ResultDescriptor> _getExpectedResults(CacheEntry entry) {
-    AnalysisTarget target = entry.target;
-    Set<ResultDescriptor> results = entry.nonInvalidResults.toSet();
-    if (target is Source) {
-      String name = target.shortName;
-      results.add(CONTENT);
-      results.add(LINE_INFO);
-      results.add(MODIFICATION_TIME);
-      if (AnalysisEngine.isDartFileName(name)) {
-        results.add(BUILD_DIRECTIVES_ERRORS);
-        results.add(BUILD_LIBRARY_ERRORS);
-        results.add(CONTAINING_LIBRARIES);
-        results.add(DART_ERRORS);
-        results.add(EXPLICITLY_IMPORTED_LIBRARIES);
-        results.add(EXPORT_SOURCE_CLOSURE);
-        results.add(EXPORTED_LIBRARIES);
-        results.add(IMPORTED_LIBRARIES);
-        results.add(INCLUDED_PARTS);
-        results.add(IS_LAUNCHABLE);
-        results.add(LIBRARY_ELEMENT1);
-        results.add(LIBRARY_ELEMENT2);
-        results.add(LIBRARY_ELEMENT3);
-        results.add(LIBRARY_ELEMENT4);
-        results.add(LIBRARY_ELEMENT5);
-        results.add(LIBRARY_ELEMENT6);
-        results.add(LIBRARY_ELEMENT);
-        results.add(LIBRARY_ERRORS_READY);
-        results.add(PARSE_ERRORS);
-        results.add(PARSED_UNIT);
-        results.add(SCAN_ERRORS);
-        results.add(SOURCE_KIND);
-        results.add(TOKEN_STREAM);
-        results.add(UNITS);
-      } else if (AnalysisEngine.isHtmlFileName(name)) {
-        results.add(DART_SCRIPTS);
-        results.add(HTML_DOCUMENT);
-        results.add(HTML_DOCUMENT_ERRORS);
-        results.add(HTML_ERRORS);
-        results.add(REFERENCED_LIBRARIES);
-      } else if (AnalysisEngine.isAnalysisOptionsFileName(name)) {
-        results.add(ANALYSIS_OPTIONS_ERRORS);
-      }
-    } else if (target is LibrarySpecificUnit) {
-      results.add(COMPILATION_UNIT_CONSTANTS);
-      results.add(COMPILATION_UNIT_ELEMENT);
-      results.add(HINTS);
-      results.add(LINTS);
-      results.add(INFERABLE_STATIC_VARIABLES_IN_UNIT);
-      results.add(LIBRARY_UNIT_ERRORS);
-      results.add(RESOLVE_DIRECTIVES_ERRORS);
-      results.add(RESOLVE_TYPE_NAMES_ERRORS);
-      results.add(RESOLVE_TYPE_BOUNDS_ERRORS);
-      results.add(RESOLVE_UNIT_ERRORS);
-      results.add(RESOLVED_UNIT1);
-      results.add(RESOLVED_UNIT2);
-      results.add(RESOLVED_UNIT3);
-      results.add(RESOLVED_UNIT4);
-      results.add(RESOLVED_UNIT5);
-      results.add(RESOLVED_UNIT6);
-      results.add(RESOLVED_UNIT7);
-      results.add(RESOLVED_UNIT8);
-      results.add(RESOLVED_UNIT9);
-      results.add(RESOLVED_UNIT10);
-      results.add(RESOLVED_UNIT11);
-      results.add(RESOLVED_UNIT12);
-      results.add(RESOLVED_UNIT);
-      results.add(STRONG_MODE_ERRORS);
-      results.add(USED_IMPORTED_ELEMENTS);
-      results.add(USED_LOCAL_ELEMENTS);
-      results.add(VARIABLE_REFERENCE_ERRORS);
-      results.add(VERIFY_ERRORS);
-    } else if (target is ConstantEvaluationTarget) {
-      results.add(CONSTANT_DEPENDENCIES);
-      results.add(CONSTANT_VALUE);
-      if (target is VariableElement) {
-        results.add(INFERABLE_STATIC_VARIABLE_DEPENDENCIES);
-        results.add(INFERRED_STATIC_VARIABLE);
-      }
-    } else if (target is AnalysisContextTarget) {
-      results.add(TYPE_PROVIDER);
-    }
-    return results.toList();
-  }
-
-  /**
-   * Return the context for the SDK whose descriptor is encoded to be the same
-   * as the given [contextFilter]. The [analysisServer] is used to access the
-   * SDKs.
-   */
-  AnalysisContext _getSdkContext(
-      AnalysisServer analysisServer, String contextFilter) {
-    DartSdkManager manager = analysisServer.sdkManager;
-    List<SdkDescription> descriptors = manager.sdkDescriptors;
-    for (SdkDescription descriptor in descriptors) {
-      if (contextFilter == _encodeSdkDescriptor(descriptor)) {
-        return manager.getSdk(descriptor, () => null)?.context;
-      }
-    }
-    return null;
-  }
-
-  /**
-   * Return `true` if the given analysis [context] has at least one entry with
-   * an exception.
-   */
-  bool _hasException(InternalAnalysisContext context) {
-    if (context == null) {
-      return false;
-    }
-    MapIterator<AnalysisTarget, CacheEntry> iterator =
-        context.analysisCache.iterator();
-    while (iterator.moveNext()) {
-      CacheEntry entry = iterator.value;
-      if (entry == null || entry.exception != null) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /**
-   * Return the folder in the [folderMap] with which the given [context] is
-   * associated.
-   */
-  Folder _keyForValue(
-      Map<Folder, AnalysisContext> folderMap, AnalysisContext context) {
-    for (Folder folder in folderMap.keys) {
-      if (folderMap[folder] == context) {
-        return folder;
-      }
-    }
-    return null;
-  }
-
-  /**
-   * Return a response displaying overall performance information.
-   */
-  void _returnAnalysisPerformance(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server is not running');
-    }
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Analysis Performance', [],
-          (StringBuffer buffer) {
-        buffer.write('<h3>Analysis Performance</h3>');
-        _writeTwoColumns(buffer, (StringBuffer buffer) {
-          //
-          // Write performance tags.
-          //
-          buffer.write('<p><b>Performance tag data</b></p>');
-          buffer.write(
-              '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-          _writeRow(buffer, ['Time (in ms)', 'Percent', 'Tag name'],
-              header: true);
-          // prepare sorted tags
-          List<PerformanceTag> tags = PerformanceTag.all.toList();
-          tags.remove(ServerPerformanceStatistics.idle);
-          tags.sort((a, b) => b.elapsedMs - a.elapsedMs);
-          // prepare total time
-          int totalTagTime = 0;
-          tags.forEach((PerformanceTag tag) {
-            totalTagTime += tag.elapsedMs;
-          });
-          // write rows
-          void writeRow(PerformanceTag tag) {
-            double percent = (tag.elapsedMs * 100) / totalTagTime;
-            String percentStr = '${percent.toStringAsFixed(2)}%';
-            _writeRow(buffer, [tag.elapsedMs, percentStr, tag.label],
-                classes: ["right", "right", null]);
-          }
-
-          tags.forEach(writeRow);
-          buffer.write('</table>');
-          //
-          // Write target counts.
-          //
-          void incrementCount(Map<String, int> counts, String key) {
-            int count = counts[key];
-            if (count == null) {
-              count = 1;
-            } else {
-              count++;
-            }
-            counts[key] = count;
-          }
-
-          Set<AnalysisTarget> countedTargets = new HashSet<AnalysisTarget>();
-          Map<String, int> sourceTypeCounts = new HashMap<String, int>();
-          Map<String, int> typeCounts = new HashMap<String, int>();
-          int explicitSourceCount = 0;
-          int explicitLineInfoCount = 0;
-          int explicitLineCount = 0;
-          int implicitSourceCount = 0;
-          int implicitLineInfoCount = 0;
-          int implicitLineCount = 0;
-          for (InternalAnalysisContext context
-              in analysisServer.analysisContexts) {
-            Set<Source> explicitSources = new HashSet<Source>();
-            Set<Source> implicitSources = new HashSet<Source>();
-            AnalysisCache cache = context.analysisCache;
-            MapIterator<AnalysisTarget, CacheEntry> iterator = cache.iterator();
-            while (iterator.moveNext()) {
-              AnalysisTarget target = iterator.key;
-              if (countedTargets.add(target)) {
-                if (target is Source) {
-                  String name = target.fullName;
-                  String sourceName;
-                  if (AnalysisEngine.isDartFileName(name)) {
-                    if (iterator.value.explicitlyAdded) {
-                      explicitSources.add(target);
-                      sourceName = 'Dart file (explicit)';
-                    } else {
-                      implicitSources.add(target);
-                      sourceName = 'Dart file (implicit)';
-                    }
-                  } else if (AnalysisEngine.isHtmlFileName(name)) {
-                    if (iterator.value.explicitlyAdded) {
-                      sourceName = 'Html file (explicit)';
-                    } else {
-                      sourceName = 'Html file (implicit)';
-                    }
-                  } else {
-                    if (iterator.value.explicitlyAdded) {
-                      sourceName = 'Unknown file (explicit)';
-                    } else {
-                      sourceName = 'Unknown file (implicit)';
-                    }
-                  }
-                  incrementCount(sourceTypeCounts, sourceName);
-                } else if (target is ConstantEvaluationTarget) {
-                  incrementCount(typeCounts, 'ConstantEvaluationTarget');
-                } else {
-                  String typeName = target.runtimeType.toString();
-                  incrementCount(typeCounts, typeName);
-                }
-              }
-            }
-
-            int lineCount(Set<Source> sources, bool explicit) {
-              return sources.fold(0, (int previousTotal, Source source) {
-                LineInfo lineInfo = context.getLineInfo(source);
-                if (lineInfo is LineInfoWithCount) {
-                  if (explicit) {
-                    explicitLineInfoCount++;
-                  } else {
-                    implicitLineInfoCount++;
-                  }
-                  return previousTotal + lineInfo.lineCount;
-                } else {
-                  return previousTotal;
-                }
-              });
-            }
-
-            explicitSourceCount += explicitSources.length;
-            explicitLineCount += lineCount(explicitSources, true);
-            implicitSourceCount += implicitSources.length;
-            implicitLineCount += lineCount(implicitSources, false);
-          }
-          List<String> sourceTypeNames = sourceTypeCounts.keys.toList();
-          sourceTypeNames.sort();
-          List<String> typeNames = typeCounts.keys.toList();
-          typeNames.sort();
-
-          buffer.write('<p><b>Target counts</b></p>');
-          buffer.write(
-              '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-          _writeRow(buffer, ['Target', 'Count'], header: true);
-          for (String sourceTypeName in sourceTypeNames) {
-            _writeRow(
-                buffer, [sourceTypeName, sourceTypeCounts[sourceTypeName]],
-                classes: [null, "right"]);
-          }
-          for (String typeName in typeNames) {
-            _writeRow(buffer, [typeName, typeCounts[typeName]],
-                classes: [null, "right"]);
-          }
-          buffer.write('</table>');
-
-          buffer.write('<p><b>Line counts</b></p>');
-          buffer.write(
-              '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-          _writeRow(buffer, ['Kind', 'Lines of Code', 'Source Counts'],
-              header: true);
-          _writeRow(buffer, [
-            'Explicit',
-            explicitLineCount.toString(),
-            '$explicitLineInfoCount / $explicitSourceCount'
-          ], classes: [
-            null,
-            "right"
-          ]);
-          _writeRow(buffer, [
-            'Implicit',
-            implicitLineCount.toString(),
-            '$implicitLineInfoCount / $implicitSourceCount'
-          ], classes: [
-            null,
-            "right"
-          ]);
-          _writeRow(buffer, [
-            'Total',
-            (explicitLineCount + implicitLineCount).toString(),
-            '${explicitLineInfoCount + implicitLineInfoCount} / ${explicitSourceCount + implicitSourceCount}'
-          ], classes: [
-            null,
-            "right"
-          ]);
-          buffer.write('</table>');
-
-          Map<ResultDescriptor, int> recomputedCounts =
-              CacheEntry.recomputedCounts;
-          List<ResultDescriptor> descriptors = recomputedCounts.keys.toList();
-          descriptors.sort(ResultDescriptor.SORT_BY_NAME);
-          buffer.write('<p><b>Results computed after being flushed</b></p>');
-          buffer.write(
-              '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-          _writeRow(buffer, ['Result', 'Count'], header: true);
-          for (ResultDescriptor descriptor in descriptors) {
-            _writeRow(buffer, [descriptor.name, recomputedCounts[descriptor]],
-                classes: [null, "right"]);
-          }
-          buffer.write('</table>');
-
-          {
-            buffer.write('<p><b>Cache consistency statistics</b></p>');
-            buffer.write(
-                '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-            _writeRow(buffer, ['Name', 'Count'], header: true);
-            _writeRow(buffer, [
-              'Changed',
-              PerformanceStatistics
-                  .cacheConsistencyValidationStatistics.numOfChanged
-            ], classes: [
-              null,
-              "right"
-            ]);
-            _writeRow(buffer, [
-              'Removed',
-              PerformanceStatistics
-                  .cacheConsistencyValidationStatistics.numOfRemoved
-            ], classes: [
-              null,
-              "right"
-            ]);
-            buffer.write('</table>');
-          }
-        }, (StringBuffer buffer) {
-          //
-          // Write task model timing information.
-          //
-          buffer.write('<p><b>Task performance data</b></p>');
-          buffer.write(
-              '<table style="border-collapse: separate; border-spacing: 10px 5px;">');
-          _writeRow(
-              buffer,
-              [
-                'Task Name',
-                'Count',
-                'Total Time (in ms)',
-                'Average Time (in ms)'
-              ],
-              header: true);
-
-          Map<Type, int> countMap = AnalysisTask.countMap;
-          Map<Type, Stopwatch> stopwatchMap = AnalysisTask.stopwatchMap;
-          List<Type> taskClasses = stopwatchMap.keys.toList();
-          taskClasses.sort((Type first, Type second) =>
-              first.toString().compareTo(second.toString()));
-          int totalTaskTime = 0;
-          taskClasses.forEach((Type taskClass) {
-            int count = countMap[taskClass];
-            if (count == null) {
-              count = 0;
-            }
-            int taskTime = stopwatchMap[taskClass].elapsedMilliseconds;
-            totalTaskTime += taskTime;
-            _writeRow(buffer, [
-              taskClass.toString(),
-              count,
-              taskTime,
-              count <= 0 ? '-' : (taskTime / count).toStringAsFixed(3)
-            ], classes: [
-              null,
-              "right",
-              "right",
-              "right"
-            ]);
-          });
-          _writeRow(buffer, ['Total', '-', totalTaskTime, '-'],
-              classes: [null, "right", "right", "right"]);
-          buffer.write('</table>');
-        });
-      });
-    });
-  }
-
-  /**
-   * Return a response containing information about an AST structure.
-   */
-  void _returnAst(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      return _returnFailure(request, 'Invalid context: $contextFilter');
-    }
-    String sourceUri = request.uri.queryParameters[SOURCE_QUERY_PARAM];
-    if (sourceUri == null) {
-      return _returnFailure(
-          request, 'Query parameter $SOURCE_QUERY_PARAM required');
-    }
-
-    InternalAnalysisContext context = analysisServer.folderMap[folder];
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - AST Structure',
-          ['Context: $contextFilter', 'File: $sourceUri'], (HttpResponse) {
-        Source source = context.sourceFactory.forUri(sourceUri);
-        if (source == null) {
-          buffer.write('<p>Not found.</p>');
-          return;
-        }
-        List<Source> libraries = context.getLibrariesContaining(source);
-        for (Source library in libraries) {
-          AnalysisTarget target = new LibrarySpecificUnit(library, source);
-          CacheEntry entry = context.analysisCache.get(target);
-          buffer.write('<b>$target</b><br>');
-          if (entry == null) {
-            buffer.write('<p>Not found.</p>');
-            continue;
-          }
-          CompilationUnit ast = _getAnyAst(entry);
-          if (ast == null) {
-            buffer.write('<p>null</p>');
-            continue;
-          }
-          AstWriter writer = new AstWriter(buffer);
-          ast.accept(writer);
-          if (writer.exceptions.isNotEmpty) {
-            buffer.write('<h3>Exceptions while creating page</h3>');
-            for (CaughtException exception in writer.exceptions) {
-              _writeException(buffer, exception);
-            }
-          }
-        }
-      });
-    });
-  }
-
-  /**
-   * Return a response containing information about a single source file in the
-   * cache.
-   */
-  void _returnCacheEntry(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    InternalAnalysisContext context = null;
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      context = _getSdkContext(analysisServer, contextFilter);
-      if (context == null) {
-        return _returnFailure(request, 'Invalid context: $contextFilter');
-      }
-      return _returnFailure(request,
-          'Cannot view cache entries from an SDK context: $contextFilter');
-    } else {
-      context = analysisServer.folderMap[folder];
-    }
-    String sourceUri = request.uri.queryParameters[SOURCE_QUERY_PARAM];
-    if (sourceUri == null) {
-      return _returnFailure(
-          request, 'Query parameter $SOURCE_QUERY_PARAM required');
-    }
-
-    List<Folder> allContexts = <Folder>[];
-    Map<Folder, List<CacheEntry>> entryMap =
-        new HashMap<Folder, List<CacheEntry>>();
-    StringBuffer invalidKeysBuffer = new StringBuffer();
-    analysisServer.folderMap.forEach((Folder folder, AnalysisContext context) {
-      Source source = context.sourceFactory.forUri(sourceUri);
-      if (source != null) {
-        MapIterator<AnalysisTarget, CacheEntry> iterator =
-            (context as InternalAnalysisContext).analysisCache.iterator();
-        while (iterator.moveNext()) {
-          if (source == iterator.key.source) {
-            if (!allContexts.contains(folder)) {
-              allContexts.add(folder);
-            }
-            List<CacheEntry> entries = entryMap[folder];
-            if (entries == null) {
-              entries = <CacheEntry>[];
-              entryMap[folder] = entries;
-            }
-            CacheEntry value = iterator.value;
-            if (value == null) {
-              if (invalidKeysBuffer.isNotEmpty) {
-                invalidKeysBuffer.write(', ');
-              }
-              invalidKeysBuffer.write(iterator.key.toString());
-            } else {
-              entries.add(value);
-            }
-          }
-        }
-      }
-    });
-    allContexts.sort((Folder firstFolder, Folder secondFolder) =>
-        firstFolder.path.compareTo(secondFolder.path));
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Cache Entry',
-          ['Context: $contextFilter', 'File: $sourceUri'], (HttpResponse) {
-        if (invalidKeysBuffer.isNotEmpty) {
-          buffer.write('<h3>Targets with null Entries</h3><p>');
-          buffer.write(invalidKeysBuffer.toString());
-          buffer.write('</p>');
-        }
-        List<CacheEntry> entries = entryMap[folder];
-        buffer.write('<h3>Analyzing Contexts</h3><p>');
-        bool first = true;
-        allContexts.forEach((Folder folder) {
-          if (first) {
-            first = false;
-          } else {
-            buffer.write('<br>');
-          }
-          InternalAnalysisContext analyzingContext =
-              analysisServer.folderMap[folder];
-          if (analyzingContext == context) {
-            buffer.write(folder.path);
-          } else {
-            buffer.write(makeLink(
-                CACHE_ENTRY_PATH,
-                {
-                  CONTEXT_QUERY_PARAM: folder.path,
-                  SOURCE_QUERY_PARAM: sourceUri
-                },
-                HTML_ESCAPE.convert(folder.path)));
-          }
-          if (entries == null) {
-            buffer.write(' (file does not exist)');
-          } else {
-            CacheEntry sourceEntry = entries
-                .firstWhere((CacheEntry entry) => entry.target is Source);
-            if (sourceEntry == null) {
-              buffer.write(' (missing source entry)');
-            } else if (sourceEntry.explicitlyAdded) {
-              buffer.write(' (explicit)');
-            } else {
-              buffer.write(' (implicit)');
-            }
-          }
-        });
-        buffer.write('</p>');
-
-        if (entries == null) {
-          buffer.write('<p>Not being analyzed in this context.</p>');
-          return;
-        }
-        for (CacheEntry entry in entries) {
-          Map<String, String> linkParameters = <String, String>{
-            CONTEXT_QUERY_PARAM: contextFilter,
-            SOURCE_QUERY_PARAM: sourceUri
-          };
-          List<ResultDescriptor> results = _getExpectedResults(entry);
-          results.sort(ResultDescriptor.SORT_BY_NAME);
-
-          buffer.write('<h3>');
-          buffer.write(HTML_ESCAPE.convert(entry.target.toString()));
-          buffer.write('</h3>');
-          buffer.write('<p>time</p><blockquote><p>Value</p><blockquote>');
-          buffer.write(entry.modificationTime);
-          buffer.write('</blockquote></blockquote>');
-          for (ResultDescriptor result in results) {
-            ResultData data = entry.getResultData(result);
-            CacheState state = entry.getState(result);
-            String descriptorName = HTML_ESCAPE.convert(result.toString());
-            String descriptorState = HTML_ESCAPE.convert(state.toString());
-            buffer
-                .write('<p>$descriptorName ($descriptorState)</p><blockquote>');
-            if (state == CacheState.VALID) {
-              buffer.write('<p>Value</p><blockquote>');
-              try {
-                _writeValueAsHtml(
-                    buffer, entry.getValue(result), linkParameters);
-              } catch (exception) {
-                buffer.write('(${HTML_ESCAPE.convert(exception.toString())})');
-              }
-              buffer.write('</blockquote>');
-            }
-            _writeTargetedResults(buffer, 'Depends on', data.dependedOnResults);
-            _writeTargetedResults(
-                buffer, 'Depended on by', data.dependentResults);
-            buffer.write('</blockquote>');
-          }
-          if (entry.exception != null) {
-            buffer.write('<dt>exception</dt><dd>');
-            _writeException(buffer, entry.exception);
-            buffer.write('</dd>');
-          }
-        }
-      });
-    });
-  }
-
-  /**
-   * Return a response indicating the set of source files in a certain cache
-   * state.
-   */
-  void _returnCacheState(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server not running');
-    }
-    // Figure out which context is being searched within.
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    // Figure out what CacheState is being searched for.
-    String stateQueryParam = request.uri.queryParameters[STATE_QUERY_PARAM];
-    if (stateQueryParam == null) {
-      return _returnFailure(
-          request, 'Query parameter $STATE_QUERY_PARAM required');
-    }
-    CacheState stateFilter = null;
-    for (CacheState value in CacheState.values) {
-      if (value.toString() == stateQueryParam) {
-        stateFilter = value;
-      }
-    }
-    if (stateFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $STATE_QUERY_PARAM is invalid');
-    }
-    // Figure out which descriptor is being searched for.
-    String descriptorFilter =
-        request.uri.queryParameters[DESCRIPTOR_QUERY_PARAM];
-    if (descriptorFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $DESCRIPTOR_QUERY_PARAM required');
-    }
-
-    // TODO(brianwilkerson) Figure out how to convert the 'descriptorFilter' to
-    // a ResultDescriptor so that we can query the state, then uncomment the
-    // code below that computes and prints the list of links.
-//    Folder folder = _findFolder(analysisServer, contextFilter);
-//    InternalAnalysisContext context = analysisServer.folderMap[folder];
-//    List<String> links = <String>[];
-//    MapIterator<AnalysisTarget, CacheEntry> iterator = context.analysisCache.iterator();
-//    while (iterator.moveNext()) {
-//      Source source = iterator.key.source;
-//      if (source != null) {
-//        CacheEntry entry = iterator.value;
-//        if (entry.getState(result) == stateFilter) {
-//          String link = makeLink(CACHE_ENTRY_PATH, {
-//            CONTEXT_QUERY_PARAM: folder.path,
-//            SOURCE_QUERY_PARAM: source.uri.toString()
-//          }, HTML_ESCAPE.convert(source.fullName));
-//          links.add(link);
-//        }
-//      }
-//    }
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Cache Search', [
-        'Context: $contextFilter',
-        'Descriptor: ${HTML_ESCAPE.convert(descriptorFilter)}',
-        'State: ${HTML_ESCAPE.convert(stateQueryParam)}'
-      ], (StringBuffer buffer) {
-        buffer.write('<p>Cache search is not yet implemented.</p>');
-//        buffer.write('<p>${links.length} files found</p>');
-//        buffer.write('<ul>');
-//        links.forEach((String link) {
-//          buffer.write('<li>$link</li>');
-//        });
-//        buffer.write('</ul>');
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying overall performance information.
-   */
-  void _returnCommunicationPerformance(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server is not running');
-    }
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Communication Performance', [],
-          (StringBuffer buffer) {
-        buffer.write('<h3>Communication Performance</h3>');
-        _writeTwoColumns(buffer, (StringBuffer buffer) {
-          ServerPerformance perf = analysisServer.performanceDuringStartup;
-          int requestCount = perf.requestCount;
-          num averageLatency = requestCount > 0
-              ? (perf.requestLatency / requestCount).round()
-              : 0;
-          int maximumLatency = perf.maxLatency;
-          num slowRequestPercent = requestCount > 0
-              ? (perf.slowRequestCount * 100 / requestCount).round()
-              : 0;
-          buffer.write('<h4>Startup</h4>');
-          buffer.write('<table>');
-          _writeRow(buffer, [requestCount, 'requests'],
-              classes: ["right", null]);
-          _writeRow(buffer, [averageLatency, 'ms average latency'],
-              classes: ["right", null]);
-          _writeRow(buffer, [maximumLatency, 'ms maximum latency'],
-              classes: ["right", null]);
-          _writeRow(buffer, [slowRequestPercent, '% > 150 ms latency'],
-              classes: ["right", null]);
-          if (analysisServer.performanceAfterStartup != null) {
-            int startupTime = analysisServer.performanceAfterStartup.startTime -
-                perf.startTime;
-            _writeRow(
-                buffer, [startupTime, 'ms for initial analysis to complete']);
-          }
-          buffer.write('</table>');
-        }, (StringBuffer buffer) {
-          ServerPerformance perf = analysisServer.performanceAfterStartup;
-          if (perf == null) {
-            return;
-          }
-          int requestCount = perf.requestCount;
-          num averageLatency = requestCount > 0
-              ? (perf.requestLatency * 10 / requestCount).round() / 10
-              : 0;
-          int maximumLatency = perf.maxLatency;
-          num slowRequestPercent = requestCount > 0
-              ? (perf.slowRequestCount * 100 / requestCount).round()
-              : 0;
-          buffer.write('<h4>Current</h4>');
-          buffer.write('<table>');
-          _writeRow(buffer, [requestCount, 'requests'],
-              classes: ["right", null]);
-          _writeRow(buffer, [averageLatency, 'ms average latency'],
-              classes: ["right", null]);
-          _writeRow(buffer, [maximumLatency, 'ms maximum latency'],
-              classes: ["right", null]);
-          _writeRow(buffer, [slowRequestPercent, '% > 150 ms latency'],
-              classes: ["right", null]);
-          buffer.write('</table>');
-        });
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying code completion information.
-   */
-  void _returnCompletionInfo(HttpRequest request) {
-    String value = request.requestedUri.queryParameters['index'];
-    int index = value != null ? int.parse(value, onError: (_) => 0) : 0;
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Completion Stats', [],
-          (StringBuffer buffer) {
-        _writeCompletionPerformanceDetail(buffer, index);
-        _writeCompletionPerformanceList(buffer);
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying diagnostic information for a single context.
-   */
-  void _returnContextDiagnostics(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server is not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    InternalAnalysisContext context = null;
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      context = _getSdkContext(analysisServer, contextFilter);
-      if (context == null) {
-        return _returnFailure(request, 'Invalid context: $contextFilter');
-      }
-    } else {
-      context = analysisServer.folderMap[folder];
-    }
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Context Diagnostics',
-          ['Context: $contextFilter'], (StringBuffer buffer) {
-        _writeContextDiagnostics(buffer, context, contextFilter);
-      });
-    });
-  }
-
-  /**
-   * Return a response containing information about a single source file in the
-   * cache.
-   */
-  void _returnContextInfo(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    InternalAnalysisContext context = null;
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      context = _getSdkContext(analysisServer, contextFilter);
-      if (context == null) {
-        return _returnFailure(request, 'Invalid context: $contextFilter');
-      }
-    } else {
-      context = analysisServer.folderMap[folder];
-    }
-
-    List<String> priorityNames = <String>[];
-    List<String> explicitNames = <String>[];
-    List<String> implicitNames = <String>[];
-    Map<String, String> links = new HashMap<String, String>();
-    List<CaughtException> exceptions = <CaughtException>[];
-    context.prioritySources.forEach((Source source) {
-      priorityNames.add(source.fullName);
-    });
-    MapIterator<AnalysisTarget, CacheEntry> iterator =
-        context.analysisCache.iterator(context: context);
-    while (iterator.moveNext()) {
-      AnalysisTarget target = iterator.key;
-      if (target is Source) {
-        CacheEntry entry = iterator.value;
-        String sourceName = target.fullName;
-        if (!links.containsKey(sourceName)) {
-          CaughtException exception = entry.exception;
-          if (exception != null) {
-            exceptions.add(exception);
-          }
-          String link = makeLink(
-              CACHE_ENTRY_PATH,
-              {
-                CONTEXT_QUERY_PARAM: contextFilter,
-                SOURCE_QUERY_PARAM: target.uri.toString()
-              },
-              sourceName,
-              exception != null);
-          if (entry.explicitlyAdded) {
-            explicitNames.add(sourceName);
-          } else {
-            implicitNames.add(sourceName);
-          }
-          links[sourceName] = link;
-        }
-      }
-    }
-    explicitNames.sort();
-    implicitNames.sort();
-
-    _overlayContents.clear();
-    context.visitContentCache((String fullName, int stamp, String contents) {
-      _overlayContents[fullName] = contents;
-    });
-
-    void _writeFiles(
-        StringBuffer buffer, String title, List<String> fileNames) {
-      buffer.write('<h3>$title</h3>');
-      if (fileNames == null || fileNames.isEmpty) {
-        buffer.write('<p>None</p>');
-      } else {
-        buffer.write('<p><table style="width: 100%">');
-        for (String fileName in fileNames) {
-          buffer.write('<tr><td>');
-          buffer.write(links[fileName]);
-          buffer.write('</td><td>');
-          if (_overlayContents.containsKey(fileName)) {
-            buffer.write(
-                makeLink(OVERLAY_PATH, {PATH_PARAM: fileName}, 'overlay'));
-          }
-          buffer.write('</td></tr>');
-        }
-        buffer.write('</table></p>');
-      }
-    }
-
-    void writeOptions(StringBuffer buffer, AnalysisOptionsImpl options,
-        {void writeAdditionalOptions(StringBuffer buffer)}) {
-      if (options == null) {
-        buffer.write('<p>No option information available.</p>');
-        return;
-      }
-      buffer.write('<p>');
-      _writeOption(
-          buffer, 'Analyze functon bodies', options.analyzeFunctionBodies);
-      _writeOption(
-          buffer, 'Enable strict call checks', options.enableStrictCallChecks);
-      _writeOption(buffer, 'Enable super mixins', options.enableSuperMixins);
-      _writeOption(buffer, 'Generate dart2js hints', options.dart2jsHint);
-      _writeOption(buffer, 'Generate errors in implicit files',
-          options.generateImplicitErrors);
-      _writeOption(
-          buffer, 'Generate errors in SDK files', options.generateSdkErrors);
-      _writeOption(buffer, 'Generate hints', options.hint);
-      _writeOption(buffer, 'Incremental resolution', options.incremental);
-      _writeOption(buffer, 'Incremental resolution with API changes',
-          options.incrementalApi);
-      _writeOption(buffer, 'Preserve comments', options.preserveComments);
-      _writeOption(buffer, 'Strong mode', options.strongMode);
-      _writeOption(buffer, 'Strong mode hints', options.strongModeHints);
-      if (writeAdditionalOptions != null) {
-        writeAdditionalOptions(buffer);
-      }
-      buffer.write('</p>');
-    }
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(
-          buffer, 'Analysis Server - Context', ['Context: $contextFilter'],
-          (StringBuffer buffer) {
-        buffer.write('<h3>Configuration</h3>');
-
-        _writeColumns(buffer, <HtmlGenerator>[
-          (StringBuffer buffer) {
-            buffer.write('<p><b>Context Options</b></p>');
-            writeOptions(buffer, context.analysisOptions);
-          },
-          (StringBuffer buffer) {
-            buffer.write('<p><b>SDK Context Options</b></p>');
-            DartSdk sdk = context?.sourceFactory?.dartSdk;
-            writeOptions(buffer, sdk?.context?.analysisOptions,
-                writeAdditionalOptions: (StringBuffer buffer) {
-              if (sdk is FolderBasedDartSdk) {
-                _writeOption(buffer, 'Use summaries', sdk.useSummary);
-              }
-            });
-          },
-          (StringBuffer buffer) {
-            List<Linter> lints = context.analysisOptions.lintRules;
-            buffer.write('<p><b>Lints</b></p>');
-            if (lints.isEmpty) {
-              buffer.write('<p>none</p>');
-            } else {
-              for (Linter lint in lints) {
-                buffer.write('<p>');
-                buffer.write(lint.runtimeType);
-                buffer.write('</p>');
-              }
-            }
-
-            List<ErrorProcessor> errorProcessors =
-                context.analysisOptions.errorProcessors;
-            int processorCount = errorProcessors?.length ?? 0;
-            buffer
-                .write('<p><b>Error Processor count</b>: $processorCount</p>');
-          }
-        ]);
-
-        SourceFactory sourceFactory = context.sourceFactory;
-        if (sourceFactory is SourceFactoryImpl) {
-          buffer.write('<h3>Resolvers</h3>');
-          for (UriResolver resolver in sourceFactory.resolvers) {
-            buffer.write('<p>');
-            buffer.write(resolver.runtimeType);
-            if (resolver is DartUriResolver) {
-              DartSdk sdk = resolver.dartSdk;
-              buffer.write(' (sdk = ');
-              buffer.write(sdk.runtimeType);
-              if (sdk is FolderBasedDartSdk) {
-                buffer.write(' (path = ');
-                buffer.write(sdk.directory.path);
-                buffer.write(')');
-              } else if (sdk is EmbedderSdk) {
-                buffer.write(' (map = ');
-                _writeMapOfStringToString(buffer, sdk.urlMappings);
-                buffer.write(')');
-              }
-              buffer.write(')');
-            } else if (resolver is SdkExtUriResolver) {
-              buffer.write(' (map = ');
-              _writeMapOfStringToString(buffer, resolver.urlMappings);
-              buffer.write(')');
-            }
-            buffer.write('</p>');
-          }
-        }
-
-        _writeFiles(
-            buffer, 'Priority Files (${priorityNames.length})', priorityNames);
-        _writeFiles(
-            buffer,
-            'Explicitly Analyzed Files (${explicitNames.length})',
-            explicitNames);
-        _writeFiles(
-            buffer,
-            'Implicitly Analyzed Files (${implicitNames.length})',
-            implicitNames);
-
-        buffer.write('<h3>Exceptions</h3>');
-        if (exceptions.isEmpty) {
-          buffer.write('<p>none</p>');
-        } else {
-          exceptions.forEach((CaughtException exception) {
-            _writeException(buffer, exception);
-          });
-        }
-
-        buffer.write('<h3>Targets Without Entries</h3>');
-        bool foundEntry = false;
-        MapIterator<AnalysisTarget, CacheEntry> iterator =
-            context.analysisCache.iterator(context: context);
-        while (iterator.moveNext()) {
-          if (iterator.value == null) {
-            foundEntry = true;
-            buffer.write('<p>');
-            buffer.write(iterator.key.toString());
-            buffer.write(' (');
-            buffer.write(iterator.key.runtimeType.toString());
-            buffer.write(')</p>');
-          }
-        }
-        if (!foundEntry) {
-          buffer.write('<p>none</p>');
-        }
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying the results of running a validation report on
-   * a single context.
-   */
-  void _returnContextValidationDiagnostics(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server is not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    InternalAnalysisContext context = null;
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      context = _getSdkContext(analysisServer, contextFilter);
-      if (context == null) {
-        return _returnFailure(request, 'Invalid context: $contextFilter');
-      }
-    } else {
-      context = analysisServer.folderMap[folder];
-    }
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Context Validation Diagnostics',
-          ['Context: $contextFilter'], (StringBuffer buffer) {
-        _writeContextValidationDiagnostics(buffer, context);
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying diagnostic information.
-   */
-  void _returnDiagnosticInfo(HttpRequest request) {
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Diagnostic info', [],
-          (StringBuffer buffer) {
-        _writeDiagnosticStatus(buffer);
-      });
-    });
-  }
-
-  /**
-   * Return a response containing information about an element structure.
-   */
-  void _returnElement(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server not running');
-    }
-    String contextFilter = request.uri.queryParameters[CONTEXT_QUERY_PARAM];
-    if (contextFilter == null) {
-      return _returnFailure(
-          request, 'Query parameter $CONTEXT_QUERY_PARAM required');
-    }
-    Folder folder = _findFolder(analysisServer, contextFilter);
-    if (folder == null) {
-      return _returnFailure(request, 'Invalid context: $contextFilter');
-    }
-    String sourceUri = request.uri.queryParameters[SOURCE_QUERY_PARAM];
-    if (sourceUri == null) {
-      return _returnFailure(
-          request, 'Query parameter $SOURCE_QUERY_PARAM required');
-    }
-
-    InternalAnalysisContext context = analysisServer.folderMap[folder];
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Element Model', [
-        'Context: $contextFilter',
-        'File: $sourceUri'
-      ], (StringBuffer buffer) {
-        Source source = context.sourceFactory.forUri(sourceUri);
-        if (source == null) {
-          buffer.write('<p>Not found.</p>');
-          return;
-        }
-        CacheEntry entry = context.analysisCache.get(source);
-        if (entry == null) {
-          buffer.write('<p>Not found.</p>');
-          return;
-        }
-        LibraryElement element = entry.getValue(LIBRARY_ELEMENT);
-        if (element == null) {
-          buffer.write('<p>null</p>');
-          return;
-        }
-        element.accept(new ElementWriter(buffer));
-      });
-    });
-  }
-
-  void _returnFailure(HttpRequest request, String message) {
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Failure', [],
-          (StringBuffer buffer) {
-        buffer.write(HTML_ESCAPE.convert(message));
-      });
-    });
-  }
-
-  void _returnMemoryUsage(HttpRequest request) {
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Memory Use', [],
-          (StringBuffer buffer) {
-        AnalysisServer server = _server.analysisServer;
-        MemoryUseData data = new MemoryUseData();
-        data.processAnalysisServer(server);
-        Map<Type, Set> instances = data.instances;
-        List<Type> instanceTypes = instances.keys.toList();
-        instanceTypes.sort((Type left, Type right) =>
-            left.toString().compareTo(right.toString()));
-        Map<Type, Set> ownerMap = data.ownerMap;
-        List<Type> ownerTypes = ownerMap.keys.toList();
-        ownerTypes.sort((Type left, Type right) =>
-            left.toString().compareTo(right.toString()));
-
-        _writeTwoColumns(buffer, (StringBuffer buffer) {
-          buffer.write('<h3>Instance Counts (reachable from contexts)</h3>');
-          buffer.write('<table>');
-          _writeRow(buffer, ['Count', 'Class name'], header: true);
-          instanceTypes.forEach((Type type) {
-            _writeRow(buffer, [instances[type].length, type],
-                classes: ['right', null]);
-          });
-          buffer.write('</table>');
-
-          buffer.write(
-              '<h3>Ownership (which classes of objects hold on to others)</h3>');
-          buffer.write('<table>');
-          _writeRow(buffer, ['Referenced Type', 'Referencing Types'],
-              header: true);
-          ownerTypes.forEach((Type type) {
-            List<String> referencingTypes =
-                ownerMap[type].map((Type type) => type.toString()).toList();
-            referencingTypes.sort();
-            _writeRow(buffer, [type, referencingTypes.join('<br>')]);
-          });
-          buffer.write('</table>');
-
-          buffer.write('<h3>Other Data</h3>');
-          buffer.write('<p>');
-          buffer.write(data.uniqueTargetedResults.length);
-          buffer.write(' non-equal TargetedResults</p>');
-          buffer.write('<p>');
-          buffer.write(data.uniqueLSUs.length);
-          buffer.write(' non-equal LibrarySpecificUnits</p>');
-          int count = data.mismatchedTargets.length;
-          buffer.write('<p>');
-          buffer.write(count);
-          buffer.write(' mismatched targets</p>');
-          if (count < 100) {
-            for (AnalysisTarget target in data.mismatchedTargets) {
-              buffer.write(target);
-              buffer.write('<br>');
-            }
-          }
-        }, (StringBuffer buffer) {
-          void writeCountMap(String title, Map<Type, int> counts) {
-            List<Type> classNames = counts.keys.toList();
-            classNames.sort((Type left, Type right) =>
-                left.toString().compareTo(right.toString()));
-
-            buffer.write('<h3>$title</h3>');
-            buffer.write('<table>');
-            _writeRow(buffer, ['Count', 'Class name'], header: true);
-            classNames.forEach((Type type) {
-              _writeRow(buffer, [counts[type], type], classes: ['right', null]);
-            });
-            buffer.write('</table>');
-          }
-
-          writeCountMap('Directly Held AST Nodes', data.directNodeCounts);
-          writeCountMap('Indirectly Held AST Nodes', data.indirectNodeCounts);
-          writeCountMap('Directly Held Elements', data.elementCounts);
-        });
-      });
-    });
-  }
-
-  void _returnOverlayContents(HttpRequest request) {
-    String path = request.requestedUri.queryParameters[PATH_PARAM];
-    if (path == null) {
-      return _returnFailure(request, 'Query parameter $PATH_PARAM required');
-    }
-    String contents = _overlayContents[path];
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Overlay', [],
-          (StringBuffer buffer) {
-        buffer.write('<pre>${HTML_ESCAPE.convert(contents)}</pre>');
-      });
-    });
-  }
-
-  /**
-   * Return a response displaying overlays information.
-   */
-  void _returnOverlaysInfo(HttpRequest request) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    if (analysisServer == null) {
-      return _returnFailure(request, 'Analysis server is not running');
-    }
-
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Overlays', [],
-          (StringBuffer buffer) {
-        buffer.write('<table border="1">');
-        _overlayContents.clear();
-        ContentCache overlayState = analysisServer.overlayState;
-        overlayState.accept((String fullName, int stamp, String contents) {
-          buffer.write('<tr>');
-          String link =
-              makeLink(OVERLAY_PATH, {PATH_PARAM: fullName}, fullName);
-          DateTime time = new DateTime.fromMillisecondsSinceEpoch(stamp);
-          _writeRow(buffer, [link, time]);
-          _overlayContents[fullName] = contents;
-        });
-        int count = _overlayContents.length;
-        buffer.write('<tr><td colspan="2">Total: $count entries.</td></tr>');
-        buffer.write('</table>');
-      });
-    });
-  }
-
-  /**
-   * Return a response indicating the status of the analysis server.
-   */
-  void _returnServerStatus(HttpRequest request) {
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server - Status', [], (StringBuffer buffer) {
-        if (_writeServerStatus(buffer)) {
-          _writeAnalysisStatus(buffer);
-          _writeEditStatus(buffer);
-          _writeExecutionStatus(buffer);
-          _writePluginStatus(buffer);
-          _writeRecentOutput(buffer);
-        }
-      });
-    });
-  }
-
-  /**
-   * Return an error in response to an unrecognized request received by the HTTP
-   * server.
-   */
-  void _returnUnknownRequest(HttpRequest request) {
-    _writeResponse(request, (StringBuffer buffer) {
-      _writePage(buffer, 'Analysis Server', [], (StringBuffer buffer) {
-        buffer.write('<h3>Unknown page: ');
-        buffer.write(request.uri.path);
-        buffer.write('</h3>');
-        buffer.write('''
-        <p>
-        You have reached an un-recognized page. If you reached this page by
-        following a link from a status page, please report the broken link to
-        the Dart analyzer team:
-        <a>https://github.com/dart-lang/sdk/issues/new</a>.
-        </p><p>
-        If you mistyped the URL, you can correct it or return to
-        ${makeLink(STATUS_PATH, {}, 'the main status page')}.
-        </p>''');
-      });
-    });
-  }
-
-  /**
-   * Return a two digit decimal representation of the given non-negative integer
-   * [value].
-   */
-  String _twoDigit(int value) {
-    if (value < 10) {
-      return '0$value';
-    }
-    return value.toString();
-  }
-
-  /**
-   * Write the status of the analysis domain (on the main status page) to the
-   * given [buffer] object.
-   */
-  void _writeAnalysisStatus(StringBuffer buffer) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    Map<Folder, AnalysisContext> folderMap = analysisServer.folderMap;
-    List<Folder> folders = folderMap.keys.toList();
-    folders.sort((Folder first, Folder second) =>
-        first.shortName.compareTo(second.shortName));
-    ServerOperationQueue operationQueue = analysisServer.operationQueue;
-
-    buffer.write('<h3>Analysis Domain</h3>');
-    _writeTwoColumns(buffer, (StringBuffer buffer) {
-      if (operationQueue.isEmpty) {
-        buffer.write('<p>Status: Done analyzing</p>');
-      } else {
-        ServerOperation operation = operationQueue.peek();
-        if (operation is PerformAnalysisOperation) {
-          Folder folder = _keyForValue(folderMap, operation.context);
-          if (folder == null) {
-            buffer.write('<p>Status: Analyzing in unmapped context</p>');
-          } else {
-            buffer.write('<p>Status: Analyzing in ${folder.path}</p>');
-          }
-        } else {
-          buffer.write('<p>Status: Analyzing</p>');
-        }
-      }
-      buffer.write('<p>Using package resolver provider: ');
-      buffer.write(_server.packageResolverProvider != null);
-      buffer.write('</p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(OVERLAYS_PATH, {}, 'All overlay information'));
-      buffer.write('</p>');
-
-      buffer.write('<p><b>Analysis Contexts</b></p>');
-      buffer.write('<p>');
-      bool first = true;
-      folders.forEach((Folder folder) {
-        if (first) {
-          first = false;
-        } else {
-          buffer.write('<br>');
-        }
-        String key = folder.shortName;
-        buffer.write(makeLink(CONTEXT_PATH, {CONTEXT_QUERY_PARAM: folder.path},
-            key, _hasException(folderMap[folder])));
-        buffer.write(' <small><b>[');
-        buffer.write(makeLink(CONTEXT_DIAGNOSTICS_PATH,
-            {CONTEXT_QUERY_PARAM: folder.path}, 'diagnostics'));
-        buffer.write(']</b></small>');
-        if (!folder.getChild('.packages').exists) {
-          buffer.write(' <small>[no .packages file]</small>');
-        }
-      });
-      buffer.write('</p>');
-      buffer.write('<p><b>SDK Contexts</b></p>');
-      buffer.write('<p>');
-      first = true;
-      DartSdkManager manager = analysisServer.sdkManager;
-      List<SdkDescription> descriptors = manager.sdkDescriptors;
-      if (descriptors.isEmpty) {
-        buffer.write('none');
-      } else {
-        Map<String, SdkDescription> sdkMap = <String, SdkDescription>{};
-        for (SdkDescription descriptor in descriptors) {
-          sdkMap[descriptor.toString()] = descriptor;
-        }
-        List<String> descriptorNames = sdkMap.keys.toList();
-        descriptorNames.sort();
-        for (String name in descriptorNames) {
-          if (first) {
-            first = false;
-          } else {
-            buffer.write('<br>');
-          }
-          SdkDescription descriptor = sdkMap[name];
-          String contextId = _encodeSdkDescriptor(descriptor);
-          buffer.write(makeLink(
-              CONTEXT_PATH,
-              {CONTEXT_QUERY_PARAM: contextId},
-              name,
-              _hasException(manager.getSdk(descriptor, () => null)?.context)));
-          buffer.write(' <small><b>[');
-          buffer.write(makeLink(CONTEXT_DIAGNOSTICS_PATH,
-              {CONTEXT_QUERY_PARAM: contextId}, 'diagnostics'));
-          buffer.write(']</b></small>');
-        }
-      }
-      buffer.write('</p>');
-
-      int freq = AnalysisServer.performOperationDelayFrequency;
-      String delay = freq > 0 ? '1 ms every $freq ms' : 'off';
-
-      buffer.write('<p><b>Performance Data</b></p>');
-      buffer.write('<p>Perform operation delay: $delay</p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(ANALYSIS_PERFORMANCE_PATH, {}, 'Task data'));
-      buffer.write('</p>');
-    }, (StringBuffer buffer) {
-      _writeSubscriptionMap(
-          buffer, AnalysisService.VALUES, analysisServer.analysisServices);
-    });
-  }
-
-  /**
-   * Write multiple columns of information to the given [buffer], where the list
-   * of [columns] functions are used to generate the content of those columns.
-   */
-  void _writeColumns(StringBuffer buffer, List<HtmlGenerator> columns) {
-    buffer
-        .write('<table class="column"><tr class="column"><td class="column">');
-    int count = columns.length;
-    for (int i = 0; i < count; i++) {
-      if (i > 0) {
-        buffer.write('</td><td class="column">');
-      }
-      columns[i](buffer);
-    }
-    buffer.write('</td></tr></table>');
-  }
-
-  /**
-   * Write performance information about a specific completion request
-   * to the given [buffer] object.
-   */
-  void _writeCompletionPerformanceDetail(StringBuffer buffer, int index) {
-    CompletionDomainHandler handler = _completionDomainHandler;
-    CompletionPerformance performance;
-    if (handler != null) {
-      List<CompletionPerformance> list = handler.performanceList;
-      if (list != null && list.isNotEmpty) {
-        performance = list[max(0, min(list.length - 1, index))];
-      }
-    }
-    if (performance == null) {
-      buffer.write('<h3>Completion Performance Detail</h3>');
-      buffer.write('<p>No completions yet</p>');
-      return;
-    }
-    buffer.write('<h3>Completion Performance Detail</h3>');
-    buffer.write('<p>${performance.startTimeAndMs} for ${performance.source}');
-    buffer.write('<table>');
-    _writeRow(buffer, ['Elapsed', '', 'Operation'], header: true);
-    performance.operations.forEach((OperationPerformance op) {
-      String elapsed = op.elapsed != null ? op.elapsed.toString() : '???';
-      _writeRow(buffer, [elapsed, '&nbsp;&nbsp;', op.name]);
-    });
-    buffer.write('</table>');
-    buffer.write('<p><b>Compute Cache Performance</b>: ');
-    if (handler.computeCachePerformance == null) {
-      buffer.write('none');
-    } else {
-      int elapsed = handler.computeCachePerformance.elapsedInMilliseconds;
-      Source source = handler.computeCachePerformance.source;
-      buffer.write(' $elapsed ms for $source');
-    }
-    buffer.write('</p>');
-  }
-
-  /**
-   * Write a table showing summary information for the last several
-   * completion requests to the given [buffer] object.
-   */
-  void _writeCompletionPerformanceList(StringBuffer buffer) {
-    CompletionDomainHandler handler = _completionDomainHandler;
-    buffer.write('<h3>Completion Performance List</h3>');
-    if (handler == null) {
-      return;
-    }
-    buffer.write('<table>');
-    _writeRow(
-        buffer,
-        [
-          'Start Time',
-          '',
-          'First (ms)',
-          '',
-          'Complete (ms)',
-          '',
-          '# Notifications',
-          '',
-          '# Suggestions',
-          '',
-          'Snippet'
-        ],
-        header: true);
-    int index = 0;
-    for (CompletionPerformance performance in handler.performanceList) {
-      String link = makeLink(COMPLETION_PATH, {'index': '$index'},
-          '${performance.startTimeAndMs}');
-      _writeRow(buffer, [
-        link,
-        '&nbsp;&nbsp;',
-        performance.firstNotificationInMilliseconds,
-        '&nbsp;&nbsp;',
-        performance.elapsedInMilliseconds,
-        '&nbsp;&nbsp;',
-        performance.notificationCount,
-        '&nbsp;&nbsp;',
-        performance.suggestionCount,
-        '&nbsp;&nbsp;',
-        HTML_ESCAPE.convert(performance.snippet)
-      ]);
-      ++index;
-    }
-
-    buffer.write('</table>');
-    buffer.write('''
-      <p><strong>First (ms)</strong> - the number of milliseconds
-        from when completion received the request until the first notification
-        with completion results was queued for sending back to the client.
-      <p><strong>Complete (ms)</strong> - the number of milliseconds
-        from when completion received the request until the final notification
-        with completion results was queued for sending back to the client.
-      <p><strong># Notifications</strong> - the total number of notifications
-        sent to the client with completion results for this request.
-      <p><strong># Suggestions</strong> - the number of suggestions
-        sent to the client in the first notification, followed by a comma,
-        followed by the number of suggestions send to the client
-        in the last notification. If there is only one notification,
-        then there will be only one number in this column.''');
-  }
-
-  /**
-   * Write diagnostic information about the given [context] to the given
-   * [buffer].
-   */
-  void _writeContextDiagnostics(StringBuffer buffer,
-      InternalAnalysisContext context, String contextFilter) {
-    AnalysisDriver driver = (context as AnalysisContextImpl).driver;
-    List<WorkItem> workItems = driver.currentWorkOrder?.workItems;
-
-    buffer.write('<p>');
-    buffer.write(makeLink(CONTEXT_VALIDATION_DIAGNOSTICS_PATH,
-        {CONTEXT_QUERY_PARAM: contextFilter}, 'Run validation'));
-    buffer.write('</p>');
-
-    buffer.write('<h3>Most Recently Perfomed Tasks</h3>');
-    AnalysisTask.LAST_TASKS.forEach((String description) {
-      buffer.write('<p>');
-      buffer.write(description);
-      buffer.write('</p>');
-    });
-
-    void writeWorkItem(StringBuffer buffer, WorkItem item) {
-      if (item == null) {
-        buffer.write('none');
-      } else {
-        buffer.write(item.descriptor?.name);
-        buffer.write(' computing ');
-        buffer.write(item.spawningResult?.name);
-        buffer.write(' for ');
-        buffer.write(item.target);
-      }
-    }
-
-    buffer.write('<h3>Work Items</h3>');
-    buffer.write('<p><b>Current:</b> ');
-    writeWorkItem(buffer, driver.currentWorkOrder?.current);
-    buffer.write('</p>');
-    if (workItems != null) {
-      workItems.reversed.forEach((WorkItem item) {
-        buffer.write('<p>');
-        writeWorkItem(buffer, item);
-        buffer.write('</p>');
-      });
-    }
-  }
-
-  /**
-   * Write diagnostic information about the given [context] to the given
-   * [buffer].
-   */
-  void _writeContextValidationDiagnostics(
-      StringBuffer buffer, InternalAnalysisContext context) {
-    Stopwatch stopwatch = new Stopwatch();
-    stopwatch.start();
-    ValidationResults results = new ValidationResults(context);
-    stopwatch.stop();
-
-    buffer.write('<h3>Validation Results</h3>');
-    buffer.write('<p>Re-analysis took ');
-    buffer.write(stopwatch.elapsedMilliseconds);
-    buffer.write(' ms</p>');
-    results.writeOn(buffer);
-  }
-
-  /**
-   * Write the status of the diagnostic domain to the given [buffer].
-   */
-  void _writeDiagnosticStatus(StringBuffer buffer) {
-    var request = new DiagnosticGetDiagnosticsParams().toRequest('0');
-
-    var stopwatch = new Stopwatch();
-    stopwatch.start();
-    var response = diagnosticHandler.handleRequest(request);
-    stopwatch.stop();
-
-    int elapsedMs = stopwatch.elapsedMilliseconds;
-    _diagnosticCallAverage.addSample(elapsedMs);
-
-    buffer.write('<h3>Timing</h3>');
-
-    buffer.write('<p>getDiagnostic (last call): ');
-    buffer.write(elapsedMs);
-    buffer.write(' (ms)</p>');
-    buffer.write('<p>getDiagnostic (rolling average): ');
-    buffer.write(_diagnosticCallAverage.value);
-    buffer.write(' (ms)</p>&nbsp;');
-
-    Map json = response.toJson()[Response.RESULT];
-    List contexts = json['contexts'];
-    contexts.sort((first, second) => first['name'].compareTo(second['name']));
-
-    // Track visited libraries.
-    Set<LibraryElement> libraries = new HashSet<LibraryElement>();
-
-    // Count SDK elements separately.
-    ElementCounter sdkCounter = new ElementCounter();
-
-    for (var context in contexts) {
-      buffer.write('<p><h3>');
-      buffer.write(context['name']);
-      buffer.write('</h3></p>');
-      buffer.write('<p>explicitFileCount: ');
-      buffer.write(context['explicitFileCount']);
-      buffer.write('</p>');
-      buffer.write('<p>implicitFileCount: ');
-      buffer.write(context['implicitFileCount']);
-      buffer.write('</p>');
-      buffer.write('<p>workItemQueueLength: ');
-      buffer.write(context['workItemQueueLength']);
-      buffer.write('</p>');
-
-      AnalysisServer server = _server.analysisServer;
-
-      if (server != null) {
-        Folder folder = _findFolder(server, context['name']);
-        InternalAnalysisContext ac = _server.analysisServer.folderMap[folder];
-        ElementCounter counter = new ElementCounter();
-
-        for (Source source in ac.librarySources) {
-          LibraryElement libraryElement = ac.getLibraryElement(source);
-          if (libraries.add(libraryElement)) {
-            if (libraryElement != null) {
-              if (libraryElement.isInSdk) {
-                libraryElement.accept(sdkCounter);
-              } else {
-                libraryElement.accept(counter);
-              }
-            }
-          }
-        }
-        buffer.write('<p>element count: ');
-        buffer.write(counter.counts.values
-            .fold<int>(0, (int prev, int element) => prev + element));
-        buffer.write('</p>');
-        buffer.write('<p>  (w/docs): ');
-        buffer.write(counter.elementsWithDocs);
-        buffer.write('</p>');
-        buffer.write('<p>total doc span: ');
-        buffer.write(counter.totalDocSpan);
-        buffer.write('</p>');
-      }
-    }
-
-    buffer.write('<p><h3>');
-    buffer.write('SDK');
-    buffer.write('</h3></p>');
-    buffer.write('<p>element count: ');
-    buffer.write(sdkCounter.counts.values
-        .fold<int>(0, (int prev, int element) => prev + element));
-    buffer.write('</p>');
-    buffer.write('<p>  (w/docs): ');
-    buffer.write(sdkCounter.elementsWithDocs);
-    buffer.write('</p>');
-    buffer.write('<p>total doc span: ');
-    buffer.write(sdkCounter.totalDocSpan);
-    buffer.write('</p>');
-  }
-
-  /**
-   * Write the status of the edit domain (on the main status page) to the given
-   * [buffer].
-   */
-  void _writeEditStatus(StringBuffer buffer) {
-    buffer.write('<h3>Edit Domain</h3>');
-    _writeTwoColumns(buffer, (StringBuffer buffer) {
-      buffer.write('<p><b>Performance Data</b></p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(COMPLETION_PATH, {}, 'Completion data'));
-      buffer.write('</p>');
-    }, (StringBuffer buffer) {});
-  }
-
-  /**
-   * Write a representation of the given [caughtException] to the given
-   * [buffer]. If [isCause] is `true`, then the exception was a cause for
-   * another exception.
-   */
-  void _writeException(StringBuffer buffer, CaughtException caughtException,
-      {bool isCause: false}) {
-    Object exception = caughtException.exception;
-
-    if (exception is AnalysisException) {
-      buffer.write('<p>');
-      if (isCause) {
-        buffer.write('Caused by ');
-      }
-      buffer.write(exception.message);
-      buffer.write('</p>');
-      _writeStackTrace(buffer, caughtException.stackTrace);
-      CaughtException cause = exception.cause;
-      if (cause != null) {
-        buffer.write('<blockquote>');
-        _writeException(buffer, cause, isCause: true);
-        buffer.write('</blockquote>');
-      }
-    } else {
-      buffer.write('<p>');
-      if (isCause) {
-        buffer.write('Caused by ');
-      }
-      buffer.write(exception.toString());
-      buffer.write('<p>');
-      _writeStackTrace(buffer, caughtException.stackTrace);
-    }
-  }
-
-  /**
-   * Write the status of the execution domain (on the main status page) to the
-   * given [buffer].
-   */
-  void _writeExecutionStatus(StringBuffer buffer) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    ExecutionDomainHandler handler = analysisServer.handlers.firstWhere(
-        (RequestHandler handler) => handler is ExecutionDomainHandler,
-        orElse: () => null);
-    Set<ExecutionService> services = new Set<ExecutionService>();
-    if (handler.onFileAnalyzed != null) {
-      services.add(ExecutionService.LAUNCH_DATA);
-    }
-
-    if (handler != null) {
-      buffer.write('<h3>Execution Domain</h3>');
-      _writeTwoColumns(buffer, (StringBuffer buffer) {
-        _writeSubscriptionList(buffer, ExecutionService.VALUES, services);
-      }, (StringBuffer buffer) {});
-    }
-  }
-
-  void _writeListItem(StringBuffer buffer, writer()) {
-    buffer.write('<li>');
-    writer();
-    buffer.write('</li>');
-  }
-
-  void _writeListOfStrings(
-      StringBuffer buffer, String listName, Iterable<String> items) {
-    List<String> itemList = items.toList();
-    itemList.sort((String a, String b) {
-      a = a.toLowerCase();
-      b = b.toLowerCase();
-      return a.compareTo(b);
-    });
-    buffer.write('List "$listName" containing ${itemList.length} entries:');
-    buffer.write('<ul>');
-    for (String member in itemList) {
-      _writeListItem(buffer, () {
-        buffer.write(member);
-      });
-    }
-    buffer.write('</ul>');
-  }
-
-  /**
-   * Write to the given [buffer] a representation of the given [map] of strings
-   * to strings.
-   */
-  void _writeMapOfStringToString(StringBuffer buffer, Map<String, String> map) {
-    List<String> keys = map.keys.toList();
-    keys.sort();
-    int length = keys.length;
-    buffer.write('{');
-    for (int i = 0; i < length; i++) {
-      buffer.write('<br>');
-      String key = keys[i];
-      if (i > 0) {
-        buffer.write(', ');
-      }
-      buffer.write(key);
-      buffer.write(' = ');
-      buffer.write(map[key]);
-    }
-    buffer.write('<br>}');
-  }
-
-  /**
-   * Write a representation of an analysis option with the given [name] and
-   * [value] to the given [buffer]. The option should be separated from other
-   * options unless the [last] flag is true, indicating that this is the last
-   * option in the list of options.
-   */
-  void _writeOption(StringBuffer buffer, String name, Object value,
-      {bool last: false}) {
-    buffer.write(name);
-    buffer.write(' = ');
-    buffer.write(value.toString());
-    if (!last) {
-      buffer.write('<br>');
-    }
-  }
-
-  /**
-   * Write a standard HTML page to the given [buffer]. The page will have the
-   * given [title] and a body that is generated by the given [body] generator.
-   */
-  void _writePage(StringBuffer buffer, String title, List<String> subtitles,
-      HtmlGenerator body) {
-    DateTime now = new DateTime.now();
-    String date = "${now.month}/${now.day}/${now.year}";
-    String time =
-        "${now.hour}:${_twoDigit(now.minute)}:${_twoDigit(now.second)}.${now.millisecond}";
-
-    buffer.write('<!DOCTYPE html>');
-    buffer.write('<html>');
-    buffer.write('<head>');
-    buffer.write('<meta charset="utf-8">');
-    buffer.write(
-        '<meta name="viewport" content="width=device-width, initial-scale=1.0">');
-    buffer.write('<title>$title</title>');
-    buffer.write('<style>');
-    buffer.write('a {color: #0000DD; text-decoration: none;}');
-    buffer.write('a:link.error {background-color: #FFEEEE;}');
-    buffer.write('a:visited.error {background-color: #FFEEEE;}');
-    buffer.write('a:hover.error {background-color: #FFEEEE;}');
-    buffer.write('a:active.error {background-color: #FFEEEE;}');
-    buffer.write(
-        'h3 {background-color: #DDDDDD; margin-top: 0em; margin-bottom: 0em;}');
-    buffer.write('p {margin-top: 0.5em; margin-bottom: 0.5em;}');
-    buffer.write(
-        'p.commentary {margin-top: 1em; margin-bottom: 1em; margin-left: 2em; font-style: italic;}');
-//    response.write('span.error {text-decoration-line: underline; text-decoration-color: red; text-decoration-style: wavy;}');
-    buffer.write(
-        'table.column {border: 0px solid black; width: 100%; table-layout: fixed;}');
-    buffer.write('td.column {vertical-align: top; width: 50%;}');
-    buffer.write('td.right {text-align: right;}');
-    buffer.write('th {text-align: left; vertical-align:top;}');
-    buffer.write('tr {vertical-align:top;}');
-    buffer.write('</style>');
-    buffer.write('</head>');
-
-    buffer.write('<body>');
-    buffer.write(
-        '<h2>$title <small><small>(as of $time on $date)</small></small></h2>');
-    if (subtitles != null && subtitles.isNotEmpty) {
-      buffer.write('<blockquote>');
-      bool first = true;
-      for (String subtitle in subtitles) {
-        if (first) {
-          first = false;
-        } else {
-          buffer.write('<br>');
-        }
-        buffer.write('<b>');
-        buffer.write(subtitle);
-        buffer.write('</b>');
-      }
-      buffer.write('</blockquote>');
-    }
-    try {
-      body(buffer);
-    } catch (exception, stackTrace) {
-      buffer.write('<h3>Exception while creating page</h3>');
-      _writeException(buffer, new CaughtException(exception, stackTrace));
-    }
-    buffer.write('</body>');
-    buffer.write('</html>');
-  }
-
-  /**
-   * Write the recent output section (on the main status page) to the given
-   * [buffer] object.
-   */
-  void _writePluginStatus(StringBuffer buffer) {
-    void writePlugin(Plugin plugin) {
-      buffer.write(plugin.uniqueIdentifier);
-      buffer.write(' (');
-      buffer.write(plugin.runtimeType);
-      buffer.write(')<br>');
-    }
-
-    buffer.write('<h3>Plugin Status</h3><p>');
-    writePlugin(AnalysisEngine.instance.enginePlugin);
-    writePlugin(_server.serverPlugin);
-    for (Plugin plugin in _server.analysisServer.userDefinedPlugins) {
-      writePlugin(plugin);
-    }
-    buffer.write('<p>');
-  }
-
-  /**
-   * Write the recent output section (on the main status page) to the given
-   * [buffer] object.
-   */
-  void _writeRecentOutput(StringBuffer buffer) {
-    buffer.write('<h3>Recent Output</h3>');
-    String output = HTML_ESCAPE.convert(_printBuffer.join('\n'));
-    if (output.isEmpty) {
-      buffer.write('<i>none</i>');
-    } else {
-      buffer.write('<pre>');
-      buffer.write(output);
-      buffer.write('</pre>');
-    }
-  }
-
-  void _writeResponse(HttpRequest request, HtmlGenerator writePage) {
-    HttpResponse response = request.response;
-    response.statusCode = HttpStatus.OK;
-    response.headers.contentType = _htmlContent;
-    try {
-      StringBuffer buffer = new StringBuffer();
-      try {
-        writePage(buffer);
-      } catch (exception, stackTrace) {
-        buffer.clear();
-        _writePage(buffer, 'Internal Exception', [], (StringBuffer buffer) {
-          _writeException(buffer, new CaughtException(exception, stackTrace));
-        });
-      }
-      response.write(buffer.toString());
-    } finally {
-      response.close();
-    }
-  }
-
-  /**
-   * Write a single row within a table to the given [buffer]. The row will have
-   * one cell for each of the [columns], and will be a header row if [header] is
-   * `true`.
-   */
-  void _writeRow(StringBuffer buffer, List<Object> columns,
-      {bool header: false, List<String> classes}) {
-    buffer.write('<tr>');
-    int count = columns.length;
-    int maxClassIndex = classes == null ? 0 : classes.length - 1;
-    for (int i = 0; i < count; i++) {
-      String classAttribute = '';
-      if (classes != null) {
-        String className = classes[min(i, maxClassIndex)];
-        if (className != null) {
-          classAttribute = ' class="$className"';
-        }
-      }
-      if (header) {
-        buffer.write('<th$classAttribute>');
-      } else {
-        buffer.write('<td$classAttribute>');
-      }
-      buffer.write(columns[i]);
-      if (header) {
-        buffer.write('</th>');
-      } else {
-        buffer.write('</td>');
-      }
-    }
-    buffer.write('</tr>');
-  }
-
-  /**
-   * Write the status of the service domain (on the main status page) to the
-   * given [response] object.
-   */
-  bool _writeServerStatus(StringBuffer buffer) {
-    AnalysisServer analysisServer = _server.analysisServer;
-    Set<ServerService> services = analysisServer.serverServices;
-
-    buffer.write('<h3>Server Domain</h3>');
-    _writeTwoColumns(buffer, (StringBuffer buffer) {
-      if (analysisServer == null) {
-        buffer.write('Status: <span style="color:red">Not running</span>');
-        return;
-      }
-      buffer.write('<p>');
-      buffer.write('Status: Running<br>');
-      buffer.write('New analysis driver: ');
-      buffer.write(analysisServer.options.enableNewAnalysisDriver);
-      buffer.write('<br>');
-      buffer.write('Instrumentation: ');
-      if (AnalysisEngine.instance.instrumentationService.isActive) {
-        buffer.write('<span style="color:red">Active</span>');
-      } else {
-        buffer.write('Inactive');
-      }
-      buffer.write('<br>');
-      buffer.write('Server version: ');
-      buffer.write(AnalysisServer.VERSION);
-      buffer.write('<br>');
-      buffer.write('SDK: ');
-      buffer.write(Platform.version);
-      buffer.write('<br>');
-      buffer.write('Process ID: ');
-      buffer.write(pid);
-      buffer.write('</p>');
-
-      buffer.write('<p><b>Performance Data</b></p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(
-          COMMUNICATION_PERFORMANCE_PATH, {}, 'Communication performance'));
-      buffer.write('</p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(DIAGNOSTIC_PATH, {}, 'General diagnostics'));
-      buffer.write('</p>');
-      buffer.write('<p>');
-      buffer.write(makeLink(MEMORY_USE_PATH, {}, 'Memory usage'));
-      buffer.write(' <small>(long running)</small></p>');
-    }, (StringBuffer buffer) {
-      _writeSubscriptionList(buffer, ServerService.VALUES, services);
-    });
-    return analysisServer != null;
-  }
-
-  /**
-   * Write a representation of the given [stackTrace] to the given [buffer].
-   */
-  void _writeStackTrace(StringBuffer buffer, StackTrace stackTrace) {
-    if (stackTrace != null) {
-      String trace = stackTrace.toString().replaceAll('#', '<br>#');
-      if (trace.startsWith('<br>#')) {
-        trace = trace.substring(4);
-      }
-      buffer.write('<p>');
-      buffer.write(trace);
-      buffer.write('</p>');
-    }
-  }
-
-  /**
-   * Given a [service] that could be subscribed to and a set of the services
-   * that are actually subscribed to ([subscribedServices]), write a
-   * representation of the service to the given [buffer].
-   */
-  void _writeSubscriptionInList(
-      StringBuffer buffer, Enum service, Set<Enum> subscribedServices) {
-    if (subscribedServices.contains(service)) {
-      buffer.write('<code>+ </code>');
-    } else {
-      buffer.write('<code>- </code>');
-    }
-    buffer.write(service.name);
-    buffer.write('<br>');
-  }
-
-  /**
-   * Given a [service] that could be subscribed to and a set of paths that are
-   * subscribed to the services ([subscribedPaths]), write a representation of
-   * the service to the given [buffer].
-   */
-  void _writeSubscriptionInMap(
-      StringBuffer buffer, Enum service, Set<String> subscribedPaths) {
-    buffer.write('<p>');
-    buffer.write(service.name);
-    buffer.write('</p>');
-    if (subscribedPaths == null || subscribedPaths.isEmpty) {
-      buffer.write('none');
-    } else {
-      List<String> paths = subscribedPaths.toList();
-      paths.sort();
-      for (String path in paths) {
-        buffer.write('<p>');
-        buffer.write(path);
-        buffer.write('</p>');
-      }
-    }
-  }
-
-  /**
-   * Given a list containing all of the services that can be subscribed to in a
-   * single domain ([allServices]) and a set of the services that are actually
-   * subscribed to ([subscribedServices]), write a representation of the
-   * subscriptions to the given [buffer].
-   */
-  void _writeSubscriptionList(StringBuffer buffer, List<Enum> allServices,
-      Set<Enum> subscribedServices) {
-    buffer.write('<p><b>Subscriptions</b></p>');
-    buffer.write('<p>');
-    for (Enum service in allServices) {
-      _writeSubscriptionInList(buffer, service, subscribedServices);
-    }
-    buffer.write('</p>');
-  }
-
-  /**
-   * Given a list containing all of the services that can be subscribed to in a
-   * single domain ([allServices]) and a set of the services that are actually
-   * subscribed to ([subscribedServices]), write a representation of the
-   * subscriptions to the given [buffer].
-   */
-  void _writeSubscriptionMap(StringBuffer buffer, List<Enum> allServices,
-      Map<Enum, Set<String>> subscribedServices) {
-    buffer.write('<p><b>Subscriptions</b></p>');
-    for (Enum service in allServices) {
-      _writeSubscriptionInMap(buffer, service, subscribedServices[service]);
-    }
-  }
-
-  /**
-   * Write the targeted results returned by iterating over the [results] to the
-   * given [buffer]. The list will have the given [title] written before it.
-   */
-  void _writeTargetedResults(
-      StringBuffer buffer, String title, Iterable<TargetedResult> results) {
-    List<TargetedResult> sortedResults = results.toList();
-    sortedResults.sort((TargetedResult first, TargetedResult second) {
-      int nameOrder =
-          first.result.toString().compareTo(second.result.toString());
-      if (nameOrder != 0) {
-        return nameOrder;
-      }
-      return first.target.toString().compareTo(second.target.toString());
-    });
-
-    buffer.write('<p>');
-    buffer.write(title);
-    buffer.write('</p><blockquote>');
-    if (results.isEmpty) {
-      buffer.write('nothing');
-    } else {
-      for (TargetedResult result in sortedResults) {
-        buffer.write('<p>');
-        buffer.write(result.result.toString());
-        buffer.write(' of ');
-        buffer.write(result.target.toString());
-        buffer.write('<p>');
-      }
-    }
-    buffer.write('</blockquote>');
-  }
-
-  /**
-   * Write two columns of information to the given [buffer], where the
-   * [leftColumn] and [rightColumn] functions are used to generate the content
-   * of those columns.
-   */
-  void _writeTwoColumns(StringBuffer buffer, HtmlGenerator leftColumn,
-      HtmlGenerator rightColumn) {
-    buffer
-        .write('<table class="column"><tr class="column"><td class="column">');
-    leftColumn(buffer);
-    buffer.write('</td><td class="column">');
-    rightColumn(buffer);
-    buffer.write('</td></tr></table>');
-  }
-
-  /**
-   * Render the given [value] as HTML and append it to the given [buffer]. The
-   * [linkParameters] will be used if the value is too large to be displayed on
-   * the current page and needs to be linked to a separate page.
-   */
-  void _writeValueAsHtml(
-      StringBuffer buffer, Object value, Map<String, String> linkParameters) {
-    if (value == null) {
-      buffer.write('<i>null</i>');
-    } else if (value is String) {
-      buffer.write('<pre>${HTML_ESCAPE.convert(value)}</pre>');
-    } else if (value is List) {
-      buffer.write('List containing ${value.length} entries');
-      buffer.write('<ul>');
-      for (var entry in value) {
-        _writeListItem(buffer, () {
-          _writeValueAsHtml(buffer, entry, linkParameters);
-        });
-      }
-      buffer.write('</ul>');
-    } else if (value is AstNode) {
-      String link =
-          makeLink(AST_PATH, linkParameters, value.runtimeType.toString());
-      buffer.write('<i>$link</i>');
-    } else if (value is Element) {
-      String link =
-          makeLink(ELEMENT_PATH, linkParameters, value.runtimeType.toString());
-      buffer.write('<i>$link</i>');
-    } else if (value is UsedLocalElements) {
-      buffer.write('<ul>');
-      _writeListItem(buffer, () {
-        HashSet<Element> elements = value.elements;
-        buffer.write('List "elements" containing ${elements.length} entries');
-        buffer.write('<ul>');
-        for (Element element in elements) {
-          _writeListItem(buffer, () {
-            String elementStr = HTML_ESCAPE.convert(element.toString());
-            buffer.write('<i>${element.runtimeType}</i>  $elementStr');
-          });
-        }
-        buffer.write('</ul>');
-      });
-      _writeListItem(buffer, () {
-        _writeListOfStrings(buffer, 'members', value.members);
-      });
-      _writeListItem(buffer, () {
-        _writeListOfStrings(buffer, 'readMembers', value.readMembers);
-      });
-      buffer.write('</ul>');
-    } else {
-      buffer.write(HTML_ESCAPE.convert(value.toString()));
-      buffer.write(' <i>(${value.runtimeType.toString()})</i>');
-    }
-  }
-
-  /**
-   * Create a link to [path] with query parameters [params], with inner HTML
-   * [innerHtml]. If [hasError] is `true`, then the link will have the class
-   * 'error'.
-   */
-  static String makeLink(
-      String path, Map<String, String> params, String innerHtml,
-      [bool hasError = false]) {
-    Uri uri = new Uri(path: path, queryParameters: params);
-    String href = HTML_ESCAPE.convert(uri.toString());
-    String classAttribute = hasError ? ' class="error"' : '';
-    return '<a href="$href"$classAttribute>$innerHtml</a>';
-  }
-}