Synchronously invokes the <link linkend="gdbus-method-org-freedesktop-ModemManager1-Call.
Hangup">Hangup</link> D-Bus method on this. The calling thread is blocked until a
reply is received.
See call_hangup for the asynchronous version of this method.
| this | |
| cancellable |
A Cancellable or null. |
|
true if the call succeeded, false if throws is set. |