Configurable::updateAction

public function updateAction(\CRestServer $server, int $id, ?array $fields = null, ?array $layout = null)
{
	$activity = ConfigurableRestApp::load($id);
	if (!$activity)
	{
		$this->addError(ErrorCode::getNotFoundError());

		return null;
	}

	$this->saveActivity($activity, $fields, $layout, $server);
	if (count($this->getErrors()))
	{
		return null;
	}

	return [
		'activity' => [
			'id' => $activity->getId(),
		]
	];
}