DispatchSourceUserDataAdd
A dispatch source that coalesces data you provide using an AND operation.
Declaration
protocol DispatchSourceUserDataAdd : DispatchSourceProtocol, SendableOverview
You do not adopt this protocol in your objects. Instead, use the makeUserDataAddSource(queue:) method to create an object that adopts this protocol.
To add custom data to the dispatch source, call the add(data:) method.