x = ["Foo", 42]
p! typeof(x) # typeof(x) # => Array(Int32 | String)

a = {"Foo", 42}
p! typeof(a) # typeof(a) # => Tuple(String, Int32)

y = {
  "name" => "Foo Bar",
  "id"   => 42,
}
p! typeof(y) # typeof(y) # => Hash(String, Int32 | String)

z = {
  "name": "Foo Bar",
  "id":   42,
}
p! typeof(z) # typeof(z) # => NamedTuple(name: String, id: Int32)
