Instance MethodFoundationEssentials
isSubset(of:)
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
func isSubset(of other: Data.WritingOptions) -> BoolInstance MethodFoundationEssentials
func isSubset(of other: Data.WritingOptions) -> Bool