func next() -> Date?
Advances to the next element and returns it, or
nil
if no next element exists.typealias Element
A type representing the sequence’s elements.
シーケンスのもつ要素それらを表しているある型。
Availability 有効性
Technology
typealias Iterator = EveryMinuteTimelineSchedule
.Entries
func next() -> Date?
nil
if no next element exists.typealias Element