anchor.diff:    }
   
     test_mixin_field_withType() {
  -    assertSameSignature(r'''
  +    _assertSameSignature(r'''
   mixin M {
     int a = 1;
   }
  
positive.code:   }
  
    test_class_field_const_add_outOfOrder() {
      assertNotSameSignature(r'''
  class A {
    static f = Object();
  }
  
negative.code:   }
  
    test_class_constructor_parameters_type() {
      _assertNotSameSignature(r'''
  class C {
    C(int p);
  }
  