code: protected boolean containsAlphabetOrPad(final byte[] arrayOctet) {
          if (arrayOctet == null) {
              return false;
          }
          for (final byte element : arrayOctet) {
              if (PAD == element || isInAlphabet(element)) {
                  return true;
              }
          }
          return false;
      }
docs: Tests a given byte array to see if it contains any characters within the alphabet or PAD.
  
  Intended for use in checking line-ending arrays
  
  @param arrayOctet
  byte array to test
  @return {@code true} if any byte is a valid character in the alphabet or PAD; {@code false} otherwise