Address::addLink

public function addLink(string $entityId, string $entityType): void
{
	if($entityId === '')
	{
		throw new ArgumentNullException('entityId');
	}

	if($entityType === '')
	{
		throw new ArgumentNullException('entityType');
	}

	$this->linkCollection->addItem(
		new AddressLink($entityId, $entityType)
	);
}