code: public static byte[] fromBase64(String base64String) {
  
          byte[] result = null;
          if (base64String != null) {
              result = Base64.decodeBase64(base64String);
          }
          return result;
      }
docs: Decodes the given base-64 string to a byte array.
  
  @param base64String A base-64 encoded string.
  @return The decoded byte array.