Creates an iterator that presents the elements of the sequences traversed by base, concatenated using separator.
init<Separator>(base: Base, separator: Separator) where Separator : Sequence, Separator.Element == Base.Element.Element ss14JoinedSequenceV4base9separatorAByxGx_qd__tcSTRd__7Element_AFQZAFRtd__lufc What are these?4RAF9import Swift@frozen struct JoinedSequence<Base> where Base : Sequence, Base.Element : SequenceA sequence that presents the elements of a base sequence of sequences concatenated using a given separator.
protocol Sequence<Element>A type that provides sequential, iterated access to its elements.
associatedtype Element where Self.Element == Self.Iterator.ElementA type representing the sequence’s elements.
typealias Element = Base.Element.Element