Fix build after analyzer_experimental changes

editor/util/plugins/com.google.dart.java2dart/resources/test_support_include.dart

 
 
 class TestSource implements Source {
   int get hashCode => 0;
   bool operator ==(Object object) {
     return object is TestSource;
   }
   AnalysisContext get context {
     throw new UnsupportedOperationException();
   }
   void getContents(Source_ContentReceiver receiver) {
     throw new UnsupportedOperationException();
   }
   String get fullName {
     throw new UnsupportedOperationException();
   }
   String get shortName {
     throw new UnsupportedOperationException();
   }
   String get encoding {
     throw new UnsupportedOperationException();
   }
   int get modificationStamp {
     throw new UnsupportedOperationException();
   }
   bool exists() => true;
-  bool isInSystemLibrary() {
+  bool get isInSystemLibrary {
     throw new UnsupportedOperationException();
   }
   Source resolve(String uri) {
     throw new UnsupportedOperationException();
   }
   Source resolveRelative(Uri uri) {
     throw new UnsupportedOperationException();
   }
   UriKind get uriKind {
     throw new UnsupportedOperationException();
@@ skipping 20 matching lines @@
         return trampoline(target, arguments[0], arguments[1]);
       case 3:
         return trampoline(target, arguments[0], arguments[1], arguments[2]);
       case 4:
         return trampoline(target, arguments[0], arguments[1], arguments[2], arguments[3]);
       default:
         throw new IllegalArgumentException("Not implemented for > 4 arguments");
     }
   }
 }