original_string: public function getParentNode($dsId)
      {
          $parentDsId = $this->getParentDsId($dsId);
  
          if (null === $parentDsId) {
              return null;
          }
  
          return $this->dsIdMap[$parentDsId];
      }
code: public function getParentNode($dsId)
      {
          $parentDsId = $this->getParentDsId($dsId);
  
          if (null === $parentDsId) {
              return null;
          }
  
          return $this->dsIdMap[$parentDsId];
      }
code_tokens: public function getParentNode ( $ dsId ) { $ parentDsId = $ this -> getParentDsId ( $ dsId ) ; if ( null === $ parentDsId ) { return null ; } return $ this -> dsIdMap [ $ parentDsId ] ; }
docstring: Get parent node by node ds_id.
  
  @param string $dsId
  
  @return ElementtypeStructureNode
docstring_tokens: Get parent node by node ds_id .