How to use Gio::DBus::Connection::signal_subscribe?

[Christof Meerwald <cmeerw cmeerw org>]

Hi,

I am confused: the documentation for
Gio::DBus::Connection::signal_subscribe mentions:

If the connection is not a message bus connection, sender must be 0.

But how is that supposed to work? "sender" is "const Glib::ustring&"
and if I try to pass in nullptr (or 0) the string constructor
complains about the null pointer.

Am I missing something?


Christof

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