original_string: public static function clear_model_files($modelid) {
          $fs = get_file_storage();
          return $fs->delete_area_files(\context_system::instance()->id, 'analytics', false, $modelid);
      }
code: public static function clear_model_files($modelid) {
          $fs = get_file_storage();
          return $fs->delete_area_files(\context_system::instance()->id, 'analytics', false, $modelid);
      }
code_tokens: public static function clear_model_files ( $ modelid ) { $ fs = get_file_storage ( ) ; return $ fs -> delete_area_files ( \ context_system :: instance ( ) -> id , 'analytics' , false , $ modelid ) ; }
docstring: Delete all files of a model.
  
  @param int $modelid
  @return bool
docstring_tokens: Delete all files of a model .