github.com/aws/aws-sdk-go-v2/internal/sync/singleflight.Group.Do (method)

one use

	github.com/aws/aws-sdk-go-v2/internal/sync/singleflight (current package)
		singleflight.go#L84: func (g *Group) Do(key string, fn func() (interface{}, error)) (v interface{}, err error, shared bool) {