docs: public EnvInfo info() {
      if (closed) {
        throw new AlreadyClosedException();
      }
      final MDB_envinfo info = new MDB_envinfo(RUNTIME);
      checkRc(LIB.mdb_env_info(ptr, info));
  
      final long mapAddress;
      if (info.f0_me_mapaddr.get() == null) {
        mapAddress = 0;
      } else {
        mapAddress = info.f0_me_mapaddr.get().address();
      }
  
      return new EnvInfo(
          mapAddress,
          info.f1_me_mapsize.longValue(),
          info.f2_me_last_pgno.longValue(),
          info.f3_me_last_txnid.longValue(),
          info.f4_me_maxreaders.intValue(),
          info.f5_me_numreaders.intValue());
    }