-int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec);
-int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec);
-int sd_event_source_get_time_clock(sd_event_source *s, clockid_t *clock);
-int sd_event_source_get_signal(sd_event_source *s);
-int sd_event_source_get_child_pid(sd_event_source *s, pid_t *pid);
+// UNNEEDED int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec);
+// UNNEEDED int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec);
+// UNNEEDED int sd_event_source_get_time_clock(sd_event_source *s, clockid_t *clock);
+// UNNEEDED int sd_event_source_get_signal(sd_event_source *s);
+// UNNEEDED int sd_event_source_get_child_pid(sd_event_source *s, pid_t *pid);