Synchronously invokes the <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem-Modem3gpp-Ussd.
Respond">Respond</link> D-Bus method on this. The calling thread is blocked until
a reply is received.
See call_respond for the asynchronous version of this method.
| this | |
| arg_response |
Argument to pass with the method invocation. |
| out_reply |
Return location for return parameter or null to ignore. |
| cancellable |
A Cancellable or null. |
|
true if the call succeeded, false if throws is set. |