code: function (obj) {
          var str = ['{'];
          for (var key in obj) {
              if (!_.isUndefined(key)) {
                  if (!_.isFunction(obj[key])) {
                      str.push(key + ':');
                      str.push(_.isUndefined(obj[key]) ? '""' : '"' + obj[key] + '"');
                      str.push(', ');
                  }
              }
          }
          str.pop();
          str.push('}');
          return str.join('');
      }
docs: Utility function to convert function into string. Generalized implementation of toString()