code: private CmsADESessionCache getSessionCache(CmsObject cms) {
  
          return m_editableRequest
          ? CmsADESessionCache.getCache((HttpServletRequest)(pageContext.getRequest()), cms)
          : null;
      }
docs: Returns the ADE session cache for container elements in case of an editable request, otherwise <code>null</code>.<p>
  
  @param cms the cms context
  
  @return the session cache