Crunz\Event::preventOverlapping PHP Method

    public function preventOverlapping()
    {
        $this->preventOverlapping = true;
        // Skip the event if it's locked (processing)
        $this->skip(function () {
            return $this->isLocked();
        });
        // Delete the lock file when the event is completed
        $this->after(function () {
            $lockfile = $this->lockFile();
            if (file_exists($lockfile)) {
                unlink($lockfile);
            }
        });
        return $this;
    }