original_string: public function modified()
      {
          $path = $this->get('filepath');
  
          if (!file_exists($path)) {
              return null;
          }
  
          return filemtime($path) ?: null;
      }
code: public function modified()
      {
          $path = $this->get('filepath');
  
          if (!file_exists($path)) {
              return null;
          }
  
          return filemtime($path) ?: null;
      }
code_tokens: public function modified ( ) { $ path = $ this -> get ( 'filepath' ) ; if ( ! file_exists ( $ path ) ) { return null ; } return filemtime ( $ path ) ? : null ; }
docstring: Get file modification time for the medium.
  
  @return int|null
docstring_tokens: Get file modification time for the medium .