void throttle_group_attach_aio_context(ThrottleGroupMember *tgm,
AioContext *new_context);
void throttle_group_detach_aio_context(ThrottleGroupMember *tgm);
+/*
+ * throttle_group_exists() must be called under the global
+ * mutex.
+ */
+bool throttle_group_exists(const char *name);
#endif