Callback interface used to determine how object should be processed during saving.
The ILinkEmbedController type exposes the following members:
|get_object_storing_location(id, entity_data, semantic_name, content_type, recomended_extension)||Determines where object should be stored.
This method is called once for each object id.
It is not guaranteed that there won’t be two objects with same data, semanticName and contentType but with different id.
|get_url(id, referrer)||Returns an URL to an external object.
This method always called if
|save_external(id, entity_data)||Saves external object.|