How to Async Append to File in Dart - Code Snippet

// Task: Async Append to File
// Language: Dart

void asyncAppendToFile() {
    // Implementation for Async Append to File
    var result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Append to File
    print("Done");
}