code: private Context getContext(ExecutionContext executionContext) {
          // Get context id.
          HttpServletRequest request = executionContext.getActionBeanContext().getRequest();
          String parameter = request.getParameter(ID_PARAMETER);
          
          // Return context.
          if (parameter != null) {
              int id = Integer.parseInt(parameter, 16);
              return contexts.get(id);
          }
          
          return null;
      }
docs: Returns wait context based on context id found in request.
  @param executionContext execution context
  @return wait context