original_string: public function getGroupName()
      {
          $userId = $this->getGroup();
          if ($userId) {
              $userData = posix_getgrgid($userId);
              return ((isset($userData['name'])) ? $userData['name'] : null);
          }
          return false;
      }
code: public function getGroupName()
      {
          $userId = $this->getGroup();
          if ($userId) {
              $userData = posix_getgrgid($userId);
              return ((isset($userData['name'])) ? $userData['name'] : null);
          }
          return false;
      }
code_tokens: public function getGroupName ( ) { $ userId = $ this -> getGroup ( ) ; if ( $ userId ) { $ userData = posix_getgrgid ( $ userId ) ; return ( ( isset ( $ userData [ 'name' ] ) ) ? $ userData [ 'name' ] : null ) ; } return false ; }
docstring: return user group name of the file or directory
  
  @return      string|bool|null         user group name of file group
docstring_tokens: return user group name of the file or directory