code: public void actionClearCaches() throws JspException {
  
          OpenCms.fireCmsEvent(new CmsEvent(I_CmsEventListener.EVENT_CLEAR_CACHES, null));
  
          setAction(CmsDialog.ACTION_CANCEL);
          actionCloseDialog();
      }
docs: Sends a clear caches event.<p>
  
  @throws JspException if something goes wrong