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Instance SubscriptFoundationEssentials

subscript(dynamicMember:)

iOS 15.0+ iPadOS 15.0+ Mac Catalyst 15.0+ macOS 12.0+ tvOS 15.0+ watchOS 8.0+ 
@preconcurrency subscript<K>(dynamicMember keyPath: KeyPath<AttributeDynamicLookup, K>) -> K.Value? where K : AttributedStringKey, K.Value : Sendable { get }