code: public CmsContainerElementData getCachedElement(String clientId) {
  
          if (m_elements.containsKey(clientId)) {
              return m_elements.get(clientId);
          }
          return null;
      }
docs: Returns the data for the requested element, or <code>null</code> if the element has not been cached yet.<p>
  
  @param clientId the element id
  
  @return the element data