code: function searchComment(text, from, startToken, endToken) {
  		var commentStart = -1;
  		var commentEnd = -1;
  		
  		var hasMatch = function(str, start) {
  			return text.substr(start, str.length) == str;
  		};
  			
  		// search for comment start
  		while (from--) {
  			if (hasMatch(startToken, from)) {
  				commentStart = from;
  				break;
  			}
  		}
  		
  		if (commentStart != -1) {
  			// search for comment end
  			from = commentStart;
  			var contentLen = text.length;
  			while (contentLen >= from++) {
  				if (hasMatch(endToken, from)) {
  					commentEnd = from + endToken.length;
  					break;
  				}
  			}
  		}
  		
  		return (commentStart != -1 && commentEnd != -1) 
  			? require('range').create(commentStart, commentEnd - commentStart) 
  			: null;
  	}
docs: Search for nearest comment in <code>str</code>, starting from index <code>from</code>
  @param {String} text Where to search
  @param {Number} from Search start index
  @param {String} start_token Comment start string
  @param {String} end_token Comment end string
  @return {Range} Returns null if comment wasn't found