append(contentsOf:) Declarationmutating func append(contentsOf newElements: String) See AlsoAppending Strings and Charactersappend(_:)append(_:)append(contentsOf:)append(contentsOf:)append(contentsOf:)reserveCapacity(_:)+(_:_:)+=(_:_:)+(_:_:)+(_:_:)+(_:_:)+=(_:_:)