docs: public <CTX> String sanitize(
        @Nullable String html,
        @Nullable HtmlChangeListener<CTX> listener, @Nullable CTX context) {
      if (html == null) { return ""; }
      StringBuilder out = new StringBuilder(html.length());
      HtmlSanitizer.sanitize(
          html,
          apply(
              HtmlStreamRenderer.create(out, Handler.DO_NOTHING),
              listener,
              context),
          preprocessor);
      return out.toString();
    }