code: void updateCss() {
  
          String formatterId = m_formatterSelect.getFormValueAsString();
          CmsFormatterConfig formatter = m_elementBean.getFormatters().get(m_containerId).get(formatterId);
          Set<String> cssResources = formatter.getCssResources();
          for (String cssResource : cssResources) {
              CmsDomUtil.ensureStyleSheetIncluded(cssResource);
          }
          if (formatter.hasInlineCss()) {
              ensureInlineCss(formatterId, formatter.getInlineCss());
          }
      }
docs: Updates the CSS resources for the selected formatter.<p>