Coerces an optional or single-or-many value into a uniform array, so callers accepting flexible input can iterate
over the result without branching on its shape.
An array holding the given values: empty if values is undefined, a single-element array if values is a
bare T, or values itself if it is already an array
Normalises a Some value into an array.
Coerces an optional or single-or-many value into a uniform array, so callers accepting flexible input can iterate over the result without branching on its shape.