created Attended Conference
fun createdAttendedConference(callee: String, currentConference: Conference, onCompletion: (Either<Conference, ConferenceError>) -> Unit)
Starts a new attended transfer to the specified callee.
Parameters
callee
Callee who is the target user you want to transfer.
current Conference
current conference, from you want to do the transfer.
on Completion
Callback that will be invoked when the request is completed. It will receive the created conference in case of success or a ConferenceError otherwise.