Deletable is the interface that wraps functions for deleting documents from a collection in a MongoDB database.

Findable is the interface that wraps functions for finding and checking the existence of document sin a collection in a MongoDB database.

Insertable is the interface that wraps functions for inserting documents into a MongoDB database.

Repository is the interface that wraps interfaces providing CRUD operations for a MongoDB database.

Updatable is the interface that wraps functions for updating documents in a collection in a MongoDB database.

Filter makes the intent of filtering clearer.