How to Parallel Append to File in Groovy - Code Snippet

// Task: Parallel Append to File
// Language: Groovy

def parallel_append_to_file() {
    // Implementation for Parallel Append to File
    def result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Parallel Append to File
    println("Done");
}