sd_bus_call_async  459 src/libsystemd/sd-bus/bus-util.c         r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
sd_bus_call_async  392 src/libsystemd/sd-bus/sd-bus.c         return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0);
sd_bus_call_async  757 src/network/networkd-link.c         r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler,
sd_bus_call_async  141 src/systemd/sd-bus.h int sd_bus_call_async(sd_bus *bus, sd_bus_slot **slot, sd_bus_message *m, sd_bus_message_handler_t callback, void *userdata, uint64_t usec);