anchor.diff:  @reflectiveTest
   class ResynthTest extends ResolverTestCase {
     Set<Source> otherLibrarySources = new Set<Source>();
  -  bool shouldCompareConstValues = false;
   
     /**
      * Determine the analysis options that should be used for this test.
  
positive.code:   }
  
    test_const_invokeConstructor_unnamed_imported() {
      shouldCompareConstValues = true;
      addLibrarySource(
          '/a.dart',
          r'''
  
negative.code:   }
  
    test_const_parameterDefaultValue_initializingFormal_named() {
      checkLibrary(r'''
  class C {
    final x;
  