How to Parallel To Uppercase in Apex - Code Snippet

// Task: Parallel To Uppercase
// Language: Apex

public void parallel_to_uppercase() {
    // Implementation for Parallel To Uppercase
    Object result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Parallel To Uppercase
    System.debug("Done");
}