MixinRefactoring.IndexerProperty.Add C# (CSharp) Метод

        public void Add(Parameter parameter) => _parameters.Add(parameter);
        public IEnumerator<Parameter> GetEnumerator() => _parameters.GetEnumerator();

 protected override Member CreateCopy()
 {
     var copy = new IndexerProperty(Type, HasGetter, HasSetter);
     foreach (var parameter in Parameters)
         copy.Add(new Parameter(parameter.Name, parameter.Type));
     return copy;                
 }