Pocketbase: Open-source back end in one file(pocketbase.io)

    type Handler[T any] func(e T) error

    type handlerPair[T any] struct {
        id      string
        handler Handler[T]
    }

    type Hook[T any] struct {
        mux      sync.RWMutex
        handlers []*handlerPair[T]
    }