How to Async Show Message Box in Apex - Code Snippet

// Task: Async Show Message Box
// Language: Apex

public void async_show_message_box() {
    // Implementation for Async Show Message Box
    Object result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Show Message Box
    System.debug("Done");
}