package ctx_keys // type Key uint32 // // The operations fsnotify can trigger; see the documentation on [Watcher] for a // // full description, and check them with [Event.Has]. // const ( // PrometheusPrefix Key = 1 << iota // ) // var keyMap = map[Key]reflect.Type{} // func get(ctx context.Context, key Key) (val any, ok bool) { // ctx.Value() // }