Instance MethodFoundationEssentials
formUnion(_:)
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
mutating func formUnion(_ other: Data.WritingOptions)Instance MethodFoundationEssentials
mutating func formUnion(_ other: Data.WritingOptions)