private void _AddProperty_Exec(object parameter)
        {
            var emptyElement = new FormElement(this)
            {
                Elements = MainView.LoadedDiagram.SubjectProperties,
                Types    = MainView.LoadedDiagram.Subjects,
            };

            PropertyElements.Add(emptyElement);
        }
        private void _AddMethod_Exec(object parameter)
        {
            var emptyMethod = new FormElement(this)
            {
                Elements    = MainView.LoadedDiagram.SubjectMethods,
                Types       = MainView.LoadedDiagram.Subjects,
                SubElements = new ObservableCollection <FormElement>()
            };

            MethodElements.Add(emptyMethod);
        }
        private void _AddParameter_Exec(object parameter)
        {
            int Id = (int)parameter;

            var emptyParameter = new FormElement(_View)
            {
                Elements = _View.MainView.LoadedDiagram.MethodParameters,
                Types    = _View.MainView.LoadedDiagram.Subjects
            };

            SubElements.Add(emptyParameter);
        }