+char *unit_name_escape_path(const char *path, const char *suffix);
+
+char *unit_dbus_path(Unit *u);
+
+int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
+
+const char *unit_type_to_string(UnitType i);
+UnitType unit_type_from_string(const char *s);
+
+const char *unit_load_state_to_string(UnitLoadState i);
+UnitLoadState unit_load_state_from_string(const char *s);
+
+const char *unit_active_state_to_string(UnitActiveState i);
+UnitActiveState unit_active_state_from_string(const char *s);
+
+const char *unit_dependency_to_string(UnitDependency i);
+UnitDependency unit_dependency_from_string(const char *s);
+
+const char *kill_mode_to_string(KillMode k);
+KillMode kill_mode_from_string(const char *s);