code: public void getElements(Set<String> clientIds, I_CmsSimpleCallback<Map<String, CmsContainerElementData>> callback) {
  
          MultiElementAction action = new MultiElementAction(clientIds, callback);
          action.execute();
      }
docs: Requests the data for container elements specified by the client id. The data will be provided to the given call-back function.<p>
  
  @param clientIds the element id's
  @param callback the call-back to execute with the requested data