final public void context_clause() throws ParseException {
    label_2:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case LIBRARY:
      case USE:
        ;
        break;
      default:
        jj_la1[1] = jj_gen;
        break label_2;
      }
      context_item();
    }
  }