How to perform 'Parallel Base64 Decode' in D.
// Task: Parallel Base64 Decode
// Language: D
void parallel_base64_decode() {
// Implementation for Parallel Base64 Decode
auto result = ...; // Initialize variable
// TODO: Implement core logic here
// Step 1: Prepare data
// Step 2: Process Parallel Base64 Decode
writeln("Done");
}