protected function bindDefaultTriggers()
    {
        $this->handlers[self::EVENT_INIT]   = $this->fluentCallback([$this, 'handleInit']);
        $this->handlers[self::EVENT_FORK]   = $this->fluentCallback([$this, 'handleFork']);
        $this->handlers[self::EVENT_START]  = $this->fluentCallback([$this, 'handleStart']);
    }