GetKey(k Key[T]) *T

	// List returns all objects in the collection.
	// Order of the list is undefined.
	List() []T

	EventStream[T]
}

// EventStream provides a link between the underlying collection
// and its clients.
// The EventStream does not publish events for retrigger operations
// where the resultant object of type T is equal to an existing
// object in the collection.
//