whole_func_string: function findValueRange(it) {
  		// find value start position
  		var skipTokens = ['white', 'line', ':'];
  		var tokens = [], token, start, end;
  		
  		it.nextUntil(function(tok) {
  			return !_.include(skipTokens, this.itemNext().type);
  		});
  		
  		start = it.current().end;
  		// consume value
  		while (token = it.next()) {
  			if (token.type == '}' || token.type == ';') {
  				// found value end
  				trimWhitespaceTokens(tokens, WHITESPACE_REMOVE_FROM_START 
  						| (token.type == '}' ? WHITESPACE_REMOVE_FROM_END : 0));
  				
  				if (tokens.length) {
  					start = tokens[0].start;
  					end = _.last(tokens).end;
  				} else {
  					end = start;
  				}
  				
  				return range(start, end - start);
  			}
  			
  			tokens.push(token);
  		}
  		
  		// reached the end of tokens list
  		if (tokens.length) {
  			return range(tokens[0].start, _.last(tokens).end - tokens[0].start);
  		}
  	}
func_code_string: function findValueRange(it) {
  		// find value start position
  		var skipTokens = ['white', 'line', ':'];
  		var tokens = [], token, start, end;
  		
  		it.nextUntil(function(tok) {
  			return !_.include(skipTokens, this.itemNext().type);
  		});
  		
  		start = it.current().end;
  		// consume value
  		while (token = it.next()) {
  			if (token.type == '}' || token.type == ';') {
  				// found value end
  				trimWhitespaceTokens(tokens, WHITESPACE_REMOVE_FROM_START 
  						| (token.type == '}' ? WHITESPACE_REMOVE_FROM_END : 0));
  				
  				if (tokens.length) {
  					start = tokens[0].start;
  					end = _.last(tokens).end;
  				} else {
  					end = start;
  				}
  				
  				return range(start, end - start);
  			}
  			
  			tokens.push(token);
  		}
  		
  		// reached the end of tokens list
  		if (tokens.length) {
  			return range(tokens[0].start, _.last(tokens).end - tokens[0].start);
  		}
  	}
func_documentation_string: Helper function that searches for CSS property value range next to
  iterator's current position
  @param {TokenIterator} it
  @returns {Range}