PropertyHandle :: RemoveFromCollection - Remove instance from collection

This function removes the selected instance from a collection. Sometimes, instances cannot be deleted because of an error. In this case, this function can be used, to remove inconsistent instances from a collection anyhow. It must be possible to locate the instance in the index (by key or position). After locating the instance, this function will remove the instance.

The function does not maintain related collections and will not delete the instance physically.