transfer_sync
Description:
[ Version ( since = "1.12" ) ]
public bool transfer_sync (Cancellable? cancellable = null) throws Error
  public bool transfer_sync (Cancellable? cancellable = null) throws Error
Synchronously joins all active and held calls, and disconnects from them.
The calling thread is blocked until a reply is received. See transfer for the asynchronous version of this method.
Parameters:
| this | A ModemVoice. | 
| cancellable | A Cancellable or  | 
Returns:
| 
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