set

type Set interface {
	// Add adds a new element to the Set and returns true if the element was not present in the set before.
	Add(element interface{}) bool

	// Delete removes the element from the Set and returns true if it did exist.
	Delete(element interface{}) bool

	// Has returns true if the element exists in the Set.
	Has(element interface{}) bool

	// ForEach iterates through the set and calls the callback for every element.
	ForEach(callback func(element interface{}))

	// Clear removes all elements from the Set.
	Clear()

	// Size returns the size of the Set.
	Size() int
}