LeanMapper\Repository::delete PHP Method

    public function delete($arg)
    {
        $this->events->invokeCallbacks(Events::EVENT_BEFORE_DELETE, $arg);
        if ($arg instanceof Entity) {
            $this->checkEntityType($arg);
            if ($arg->isDetached()) {
                throw new InvalidStateException('Cannot delete detached entity.');
            }
        }
        $result = $this->deleteFromDatabase($arg);
        if ($arg instanceof Entity) {
            $arg->detach();
        }
        $this->events->invokeCallbacks(Events::EVENT_AFTER_DELETE, $arg);
        return $result;
    }