docs: public TreeSet<HtmlParameter> getFormParams() {
  		final String contentType = mReqHeader.getHeader(HttpRequestHeader.CONTENT_TYPE);
  		if (contentType == null
  				|| !StringUtils.startsWithIgnoreCase(contentType.trim(), HttpHeader.FORM_URLENCODED_CONTENT_TYPE)) {
  			return new TreeSet<>();
  		}
  		return this.getParamsSet(HtmlParameter.Type.form);
  	}