Instance MethodFoundationEssentials
mergeAttributes(_:mergePolicy:)
iOS 26.0+
iPadOS 26.0+
Mac Catalyst 26.0+
macOS 26.0+
tvOS 26.0+
visionOS 26.0+
watchOS 26.0+
mutating func mergeAttributes(_ attributes: AttributeContainer, mergePolicy: AttributedString.AttributeMergePolicy = .keepNew)