code: function(gradient) {
  			var result = null;
  			require('utils').trim(gradient).replace(/^([\w\-]+)\((.+?)\)$/, function(str, type, definition) {
  				// remove vendor prefix
  				type = type.toLowerCase().replace(/^\-[a-z]+\-/, '');
  				if (type == 'linear-gradient' || type == 'lg') {
  					result = parseLinearGradient(definition);
  					return '';
  				}
  				
  				return str;
  			});
  			
  			return result;
  		}
docs: Parses gradient definition
  @param {String} gradient
  @returns {Object}