/**
* @param object|string|null $object
* @return string|null
*/
protected function getRelationshipType($object)
{
if ($object instanceof ToOneRelationship || $object === ToOneRelationship::getClass()) {
return "to-one";
} elseif ($object instanceof ToManyRelationship || $object === ToManyRelationship::getClass()) {
return "to-many";
}
return null;
}
