func checkAinB(t *testing.T, a, b []swarm.Address) {
	t.Helper()
	for _, v := range a {
		if !isIn(v, b) {
			t.Fatalf("address %s not found in slice %s", v, b)
		}
	}
}
// check that every a exists in b
check that every a exists in b
// check that every a exists in b
func checkAinB(t *testing.T, a, b []swarm.Address) {
	t.Helper()
	for _, v := range a {
		if !isIn(v, b) {
			t.Fatalf("address %s not found in slice %s", v, b)
		}
	}
}
func checkAinB ( t * testing . T , a , b [ ] swarm . Address ) { t . Helper ( ) for _ , v := range a { if ! isIn ( v , b ) { t . Fatalf ( " " , v , b ) } } }
check that every a exists in b
check that every a exists in b