Convert isX() methods to isX getter.

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

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 library engine.instrumentation;
 import 'java_core.dart';
 /**
  * The class `Instrumentation` implements support for logging instrumentation information.
  *
  * Instrumentation information consists of information about specific operations. Those operations
  * can range from user-facing operations, such as saving the changes to a file, to internal
  * operations, such as tokenizing source code. The information to be logged is gathered by[InstrumentationBuilder instrumentation builder], created by one of the static methods on
@@ skipping 57 matching lines @@
    * Return a builder that will silently ignore all data and logging requests.
    * @return the builder (not `null`)
    */
   static InstrumentationBuilder get nullBuilder => _NULL_INSTRUMENTATION_BUILDER;
 
   /**
    * Is this instrumentation system currently configured to drop instrumentation data provided to
    * it?
    * @return
    */
-  static bool isNullLogger() => identical(_CURRENT_LOGGER, _NULL_LOGGER);
+  static bool get isNullLogger => identical(_CURRENT_LOGGER, _NULL_LOGGER);
 
   /**
    * Set the logger that should receive instrumentation information to the given logger.
    * @param logger the logger that should receive instrumentation information
    */
   static void set logger(InstrumentationLogger logger2) {
     _CURRENT_LOGGER = logger2 == null ? _NULL_LOGGER : logger2;
   }
 }
 class InstrumentationBuilder_12 implements InstrumentationBuilder {
@@ skipping 181 matching lines @@
 abstract class InstrumentationLogger {
 
   /**
    * Create a builder that can collect the data associated with an operation identified by the given
    * name.
    * @param name the name used to uniquely identify the operation
    * @return the builder that was created
    */
   InstrumentationBuilder createBuilder(String name);
 }