code: protected function partialPathString($offset, $length = null, $dataArray = false)
      {
          if ($dataArray == false) {
              $dataArray = $this->path;
          }
          $partialPathArray = array_slice($dataArray, $offset, $length);
          return implode('/', $partialPathArray);
      }
docs: The following two methods work off the URL path stored in $this->path.
  They are used to return part of that path in either Array or String form
  when asked to by the recursive calls of routeFind().