cancel_sync

Description:

[ Version ( since = "1.0" ) ]
public bool cancel_sync (Cancellable? cancellable = null) throws Error

Synchronously cancels an ongoing USSD session, either mobile or network initiated.

The calling thread is blocked until a reply is received. See cancel for the asynchronous version of this method.

this	A Modem3gppUssd.
cancellable	A Cancellable or `null`.

true if the session was successfully cancelled, false if error is set.