// Copyright 2021 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package a import "sync" type Loader[K comparable, R any] struct { batch *LoaderBatch[K, R] } func (l *Loader[K, R]) Load() error { l.batch.f() return nil } type LoaderBatch[K comparable, R any] struct { once *sync.Once } func (b *LoaderBatch[K, R]) f() { b.once.Do(func() {}) }