index(before:)
A value less than or equal to the number of elements in the collection.
Declaration
func index(before i: LazyMapSequence<Base, Element>.Index) -> LazyMapSequence<Base, Element>.IndexA value less than or equal to the number of elements in the collection.
func index(before i: LazyMapSequence<Base, Element>.Index) -> LazyMapSequence<Base, Element>.Index