anchor.diff:    }
   
     test_topLevelVariable_withoutType() {
  -    assertNotSameSignature(r'''
  +    _assertNotSameSignature(r'''
   var a = 1;
   ''', r'''
   var a = 2;
  
positive.code:   }
  
    test_topLevelVariable_withType_const() {
      assertNotSameSignature(r'''
  const int a = 1;
  ''', r'''
  const int a = 2;
  
negative.code: ''');
    }
  
    test_executable_body_expression() {
      _assertSameSignature_executable(r'''
  int foo() => 1;
  ''', r'''
  int foo() => 2;
  ''');
    }
  
    test_executable_body_expression_to_block() {
      _assertSameSignature_executable(r'''
  int foo() => 1;
  ''', r'''
  int foo() {
    return 2;
  }
  ''');
    }
  
    test_executable_body_sync_to_async() {
      _assertNotSameSignature_executable(r'''
  foo() {}
  ''', r'''
  foo() async {}
  ''');
    }
  
    test_executable_body_sync_to_syncStar() {
      _assertNotSameSignature_executable(r'''
  foo() sync* {}
  ''', r'''
  foo() {}
  ''');
    }
  
    test_executable_body_syncStar_to_sync() {
      _assertNotSameSignature_executable(r'''
  foo() sync* {}
  ''', r'''
  foo() {}
  ''');
    }
  
    test_executable_getter_body_block_to_expression() {
      _assertSameSignature_executable(r'''
  int get foo {
    return 1;
  }
  