fun transferConference(callee: Callee, mediaTypes: List<MediaType>? = null, onCompletion: (ConferenceError?) -> Unit): Unit
Transfer the current conference to the specified Callee.
callee - Callee who is going to be transferred to.
mediaTypes - List of media types that the caller wants the transferee to share.
By default, the requested media types are the same as the ones shared by the participant who starts the transfer.
onCompletion - Callback that will be invoked when the request is completed.
It will receive a ConferenceError if any error occurs. In case of success, error will be null.