// Param-map JIT HostCall PoC with integer keys
box Utils {
    sumKeys(m) {
        // get(1) + get(2)
        return m.get(1) + m.get(2)
    }
}

m = new MapBox()
m.set(1, 10)
m.set(2, 20)
u = new Utils()
print(u.sumKeys(m))