anchor.diff:  
     @override
     List<TypeParameterElement> get typeParameters {
  -    return TypeParameterMember.from2(
  +    return TypeParameterMember.from(
         baseElement.typeParameters,
         _substitution,
       );
  
positive.code: 
    @override
    List<TypeParameterElement> get typeParameters {
      return TypeParameterMember.from2(
        baseElement.typeParameters,
        _substitution,
      );
  
negative.code:     return buffer.toString();
    }
  
    static List<TypeParameterElement> from(
      List<TypeParameterElement> elements,
      MapSubstitution substitution,
    ) {
  