int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);
-int bus_message_append_sender(sd_bus_message *m, const char *sender);
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void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m);
void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m);