What is the built-in Swift Concurrency element called that is used to organize task queues in the main thread?

In Swift Concurrency, the built-in DispatchQueue.main element is used to organize task queues on the main thread. This is a global queue that guarantees task execution on the main thread, which is especially important for updating the user interface.

Example of usage:

DispatchQueue.main.async {
    // Code that should be executed on the main thread
    updateUI()
}

In the context of Swift Concurrency, @MainActor can also be used to indicate that a function or class should be executed on the main thread.