// unwrap into single value
unwrap: or([1, 1, 1])

// unique duplicate values
unique1: or([2, 1, 1, 2])

unique2: or([{a: 1}, {a: 1}, {a: 2}])

// do not unique embedded scalars with differing values for child definitions.
embed1: or([{2, #x: 1}, {2, #x: 2}])