UserFieldManager::belongsToEntity

public function belongsToEntity(AttachedObject $attachedObject, $entityType, $entityId)
{
	list($connectorClass, $moduleId) = $this->getConnectorDataByEntityType($entityType);

	return
		$attachedObject->getEntityId()   == $entityId &&
		$attachedObject->getModuleId()   === $moduleId &&
		$attachedObject->getEntityType() === $connectorClass
	;
}