collections

type Bitset interface {
	Equals(Bitset) bool
	Len() int
	Cap() int
	Get(int) bool
	CountOn() int
	CountOff() int
	EachOn(interfaces.FuncIter[int]) error
	EachOff(interfaces.FuncIter[int]) error
	NthOn(int) (int, bool)

	Add(int)
	Del(int)
	DelIfPresent(int)
	// contains filtered or unexported methods
}

type KeyFunc[T any] func(T) string