HH\ImmSet::immutable

Returns an immutable copy (ImmSet) of the current ImmSet

public function immutable(): ImmSet<Tv>;

This method is interchangeable with toImmSet().

Returns

• ImmSet<Tv> - an ImmSet that is a copy of the current ImmSet.

Examples

See [Set::immutable](</hack/reference/class/Set/immutable/#examples>) for usage examples.