code: private String getPreviewContent(CmsObject cms, CmsResource resource, Locale locale) {
  
          return getPreviewContent(getRequest(), getResponse(), cms, resource, locale);
      }
docs: Renders the preview content for the given resource and locale.<p>
  
  @param cms the cms context
  @param resource the resource
  @param locale the content locale
  
  @return the rendered HTML preview content