KeySet creates a Set from a keys of a map[comparable](? extends interface{}).

List returns the contents as a sorted T slice.

New creates a Set from a list of values.

NewWithSize creates a Set from a list of values with size.

Empty is public since it is used by some internal API objects for conversions between external string arrays and internal sets, and conversion logic requires public types today.

Set is a set of the same type elements, implemented via map[comparable]struct{} for minimal memory consumption.