module Test {
    yang-version 1;
    namespace http://huawei.com;
    prefix Ant;
     container food {
       choice snack {
           case sports-arena {
               leaf pretzel {
                   type empty;
               }
           }
           case late-night {
               choice dinner {
                  case late-night {
                   leaf beer {
                       type empty;
                   }
               }
           }
       }
    }
  }
}