code: public String getOriginalText() {
      StringBuilder sb = new StringBuilder();
      for (TextPart part : parts) {
        if (part.getType() == TextPart.Type.TEXT) {
          sb.append(part.getPart());
        }
      }
      return sb.toString();
    }
docs: Get the plain text, without markup and content from {@code interpretAs}.
  @since 4.3