When creating a response to a D-Bus message with 

reply = l_dbus_message_new_method_return(msg);

where the original method has an empty (void) return list, is it neccessary to set the arguments:

l_dbus_message_set_arguments(reply, "");

or can I just:

return l_dbus_message_new_method_return(msg);

from within the message handler? (without setting non-existant arguments)