How to Parallel Get File Extension in Apex - Code Snippet

// Task: Parallel Get File Extension
// Language: Apex

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