type golang.org/x/sync/errgroup.token

5 uses

	golang.org/x/sync/errgroup (current package)
		errgroup.go#L15: type token struct{}
		errgroup.go#L27: 	sem chan token
		errgroup.go#L68: 		g.sem <- token{}
		errgroup.go#L93: 		case g.sem <- token{}:
		errgroup.go#L131: 	g.sem = make(chan token, n)

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