How to Base64 Decode in Apex - Code Snippet

// Task: Base64 Decode
// Language: Apex

public void base64_decode() {
    // Implementation for Base64 Decode
    Object result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Base64 Decode
    System.debug("Done");
}