code: private static String getPreviewInclude(String buttonLeft, String titleMessage) {
  
          StringBuffer buffer = new StringBuffer();
          buffer.append("<style type=\"text/css\"> @import url(\"").append(
              CmsGwtActionElement.getFontIconCssLink()).append("\"); </style>\n");
          buffer.append(String.format(PREVIEW_INCLUDE_SCRIPT, buttonLeft, titleMessage));
          return buffer.toString();
      }
docs: Returns the preview mode include.<p>
  
  @param buttonLeft the button left parameter
  @param titleMessage the title attribute of the "Editor mode" button rendered by the include
  
  @return the preview mode include