tcldr

// A simple serial queue. Every operation sent through the queue will be executed
// in first-in first-out order. Every operation will complete its execution fully,
// even if it includes suspension points, prior to the next operation commencing.
//
// TIP: If calling from a global actor like @MainActor annotate your closure to
// get better ergonomics: `queue.send { @MainActor in /* ... */ }`

public final class AsyncSerialQueue: Sendable {