docs: public static void fillMimeMessage (@Nonnull final MimeMessage aMimeMessage,
                                        @Nonnull final IMutableEmailData aMailData,
                                        @Nullable final Charset aCharset)
    {
      try
      {
        fillMimeMessageUnsafe (aMimeMessage, aMailData, aCharset);
      }
      catch (final RuntimeException ex)
      {
        throw ex;
      }
      catch (final Exception ex)
      {
        throw new IllegalArgumentException (ex);
      }
    }