public ReplaceTypeEmptyBlockItem(
			string text,
			IBlockFactory factory,
			TypeEmptyBlock empty)
            : base(text, factory)
        {
            emptyBlock = empty;
        }
        public ReplaceTypeEmptyBlockItem(
			string text,
			IEnumerable<Type> blockTypes,
			TypeEmptyBlock empty)
            : base(text, blockTypes)
        {
            emptyBlock = empty;
        }