ObserverManager::normalizeEntityTypeId

static function normalizeEntityTypeId($entityTypeID): int
{
	if(!is_int($entityTypeID))
	{
		$entityTypeID = (int)$entityTypeID;
	}

	if(!\CCrmOwnerType::IsDefined($entityTypeID))
	{
		throw new Main\ArgumentOutOfRangeException('entityTypeID',
			\CCrmOwnerType::FirstOwnerType,
			\CCrmOwnerType::LastOwnerType
		);
	}

	return $entityTypeID;
}