Transfer a unique star gift.
Note: this method is not indended to be used by full-fledged clients, as this method hides the actual invoice and payment form from the user. For GUI clients, you should refer to the method's source code and present the payment form to the user.
ID of the message containing the gift
ID of the user to transfer the gift to
Optional
Whether to dispatch the new message event to the client's update handler.
Service message about the transferred gift
Transfer a unique star gift.