How to Async Check File Exists in D - Code Snippet

// Task: Async Check File Exists
// Language: D

void async_check_file_exists() {
    // Implementation for Async Check File Exists
    auto result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Check File Exists
    writeln("Done");
}