root: {
    "La12": "Boca",
    "true": "Mariano",
    "false": "Emiliano",
    Name: "Luis",
    "$(in0.key)": "de Bello",
    dyn: in0.contacts map { "$($.name)": $.age } reduce ($$ ++ $),
    "Age_$(in0.contacts[0].age)": in0.contacts[0].name,
    (in0.key ++ "2") @(name:"bar") : "de Bello",
    foo @((in0.@)) : "bar"
}