/// A service which can execute jobs. @available(SwiftStdlib 5.5, *) public protocol SerialExecutor: Executor { // This requirement is repeated here as a non-override so that we // get a redundant witness-table entry for it. This allows us to // avoid drilling down to the base conformance just for the basic // work-scheduling operation. @_nonoverride func enqueue(_ job: UnownedJob) /// Convert this executor value to the optimized form of borrowed /// executor references. func asUnownedSerialExecutor() -> UnownedSerialExecutor }
