public MultiLineTextBoxInputElement(IExpressionViewModel expressionViewModel, string elementLabel, string selectLabel, string defaultValue)
			: base(elementLabel, expressionViewModel)
		{
			ElementLabel = elementLabel;
			SelectLabel = selectLabel;
			_defaultValue = defaultValue;
			_valueSelectorEl = WithCustomSelect(ValueSelector, SelectLabel) as CustomSelectorElement;
		}
		public CategoryElement(IExpressionViewModel expressionViewModel)
			: base(ElementLabel, expressionViewModel)
		{
			_valueSelectorEl = WithCustomSelect(ValueSelector, SelectLabel) as CustomSelectorElement;
		}
		public ItemsInEntry(IExpressionViewModel expressionViewModel)
			: base(ElementLabel, expressionViewModel)
		{
			WithLabel(Prefix);
            _valueSelectorEl = WithCustomSelect(ValueSelector, SelectLabel) as CustomSelectorElement;
        }