code: public function handleException(\Throwable $e) : bool
      {
          $handled_cnt = 0;
          foreach($this->ex_handlers as $handler)
          {
              if ($handler->handleException($e)){
                  $handled_cnt ++;
              }
          }
          return $handled_cnt > 0;
      }
docs: Handle exception
  
  @param \Throwable $e
  
  @return bool