value any
	ok    bool
}

func randValue(r *rand.Rand) any {
	b := make([]byte, r.Intn(4))
	for i := range b {
		b[i] = 'a' + byte(rand.Intn(26))
	}
	return string(b)
}

func (mapCall) Generate(r *rand.Rand, size int) reflect.Value {
	c := mapCall{op: mapOps[rand.Intn(len(mapOps))], k: randValue(r)}
	switch c.op {
	case opStore, opLoadOrStore:
		c.v = randValue(r)
	}
	return reflect.ValueOf(c)
}