code: @Nullable
    @ReturnsMutableCopy
    public static byte [] safeDecode (@Nullable final String sEncoded, final int nOptions)
    {
      if (sEncoded != null)
        try
        {
          return decode (sEncoded, nOptions);
        }
        catch (final Exception ex)
        {
          // fall through
        }
      return null;
    }
docs: Decode the string with the default encoding (US-ASCII is the preferred
  one).
  
  @param sEncoded
  The encoded string.
  @param nOptions
  Decoding options.
  @return <code>null</code> if decoding failed.