Function first

control/controlclient/map_test.go:1038–1044

(s []T)

}

func first[T any](s []T) T {
	if len(s) == 0 {
		var zero T
		return zero
	}
	return s[0]
}

func TestDeltaDERPMap(t *testing.T) {
	regions1 := map[int]*tailcfg.DERPRegion{