singleflight

type Group interface {
	Do(key string, fn func() (interface{}, error)) (v interface{}, err error, shared bool)
	DoChan(key string, fn func() (interface{}, error)) <-chan singleflight.Result
}

type Job[T any] struct {
	WorkIdentify string
	CacheGetter  func() (*T, error)
	CacheSetter  func(*T) error
	OnceGetter   func() (*T, error)
}