code: function detachCustomValues(ruleName) {
      ruleName = removeSpace(ruleName);
      var argsRE = /\(\S+\)/g;
      var args = [];
      if(ruleName.match(argsRE)) {
          args = ruleName.match(argsRE)[0].replace(/\(|\)/g, '').split(',');
      }
  
      return args;
  }
docs: [detachCustomValues description]
  @param  {[String]} ruleName [ruleName]
  @return {[Array]}
  
  'rem(a, b, c)' => ['a', 'b', 'c']