public StyleDocument LoadFromString(string input)
		{
			var stream = new ANTLRStringStream(input);
			var lexer = new lesscssLexer(stream);
			var parser = new lesscssParser(new CommonTokenStream(lexer));
			var root = parser.lessCss();

			return ParseDocument((BaseTree)root.Tree);
		}
		private static lesscssParser CreateParser(string input)
		{
			var stream = new ANTLRStringStream(input);
			var lexer = new lesscssLexer(stream);
			return new lesscssParser(new CommonTokenStream(lexer));
		}