If this method invocation is a property Get, Set or GetAll call that
has been redirected to the method call handler then %NULL will be
returned. See g_dbus_method_invocation_get_property_info() and
#GDBusInterfaceVTable for more information.
Return: A #GDBusMethodInfo or %NULL. Do not free, it is owned by @invocation.
Gets information about the method call, if any.
If this method invocation is a property Get, Set or GetAll call that has been redirected to the method call handler then %NULL will be returned. See g_dbus_method_invocation_get_property_info() and #GDBusInterfaceVTable for more information.
Return: A #GDBusMethodInfo or %NULL. Do not free, it is owned by @invocation.