code: function buildTrim() {
      var support = getTrimmableCharacters().match(/^\s+$/);
      try { string.prototype.trim.call([1]); } catch(e) { support = false; }
      extend(string, true, !support, {
  
        /***
         * @method trim[Side]()
         * @returns String
         * @short Removes leading and/or trailing whitespace from the string.
         * @extra Whitespace is defined as line breaks, tabs, and any character in the "Space, Separator" Unicode category, conforming to the the ES5 spec. The standard %trim% method is only added when not fully supported natively.
         *
         * @set
         *   trim
         *   trimLeft
         *   trimRight
         *
         * @example
         *
         *   '   wasabi   '.trim()      -> 'wasabi'
         *   '   wasabi   '.trimLeft()  -> 'wasabi   '
         *   '   wasabi   '.trimRight() -> '   wasabi'
         *
         ***/
        'trim': function() {
          return this.toString().trimLeft().trimRight();
        },
  
        'trimLeft': function() {
          return this.replace(regexp('^['+getTrimmableCharacters()+']+'), '');
        },
  
        'trimRight': function() {
          return this.replace(regexp('['+getTrimmableCharacters()+']+$'), '');
        }
      });
    }
docs: *
  String module
  
  *