code: function (keyOrNsString) {
                  return sjl.jsonClone(
                      sjl.notEmptyAndOfType(keyOrNsString, String) ?
                         sjl.searchObj(keyOrNsString, this) : this
                  );
              }
docs: toJSON of its own properties or properties found at key/key-namespace-string.
  @method sjl.stdlib.Config#toJSON
  @param keyOrNsString {String} - Optional.
  @returns {JSON}