A #GDBusConnection.
The unique bus name of the remote caller.
The object path that the method was invoked on.
The D-Bus interface name the method was invoked on.
The name of the method that was invoked.
A #GVariant tuple with parameters.
A #GDBusMethodInvocation object that must be used to return a value or error.
The type of the
method_call
function in #GDBusInterfaceVTable.