Helper function used in service implementations to finish handling invocations of the <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem.
SetCurrentCapabilities">SetCurrentCapabilities</link> D-Bus method. If you instead want to finish handling an
invocation by returning an error, use return_error or
similar.
This method will free invocation, you cannot use it afterwards.
| this |
A GdbusModem. |
| invocation |