anchor.diff:  @reflectiveTest
   class RecordLiteralTest extends PubPackageResolutionTest {
     test_noContext_mixed() async {
  -    // Restore the code below when record types can be serialized.
  -//     await assertNoErrorsInCode(r'''
  -// final x = (0, f1: 1, 2, f2: 3, 4);
  -// ''');
       await assertNoErrorsInCode(r'''
  -void f() {
  -  (0, f1: 1, 2, f2: 3, 4);
  -}
  +final x = (0, f1: 1, 2, f2: 3, 4);
   ''');
   
       final node = findNode.recordLiteral('(0,');
  
positive.code:   }
  
    test_noContext_named() async {
      // Restore the code below when record types can be serialized.
  //     await assertNoErrorsInCode(r'''
  // final x = (f1: 0, f2: true);
  // ''');
      await assertNoErrorsInCode(r'''
  void f() {
    (f1: 0, f2: true);
  }
  ''');
  
      final node = findNode.recordLiteral('(f1:');
  
negative.code:   }
  
    test_noContext_positional() async {
      await assertNoErrorsInCode(r'''
  final x = (0, true);
  ''');
  
      final node = findNode.recordLiteral('(0,');
  