code: function (callback) {
              async.map([ "tid.dat.gz", "tid_pos.dat.gz", "tid_map.dat.gz" ], function (filename, _callback) {
                  loadArrayBuffer(path.join(dic_path, filename), function (err, buffer) {
                      if(err) {
                          return _callback(err);
                      }
                      _callback(null, buffer);
                  });
              }, function (err, buffers) {
                  if(err) {
                      return callback(err);
                  }
                  var token_info_buffer = new Uint8Array(buffers[0]);
                  var pos_buffer = new Uint8Array(buffers[1]);
                  var target_map_buffer = new Uint8Array(buffers[2]);
  
                  dic.loadTokenInfoDictionaries(token_info_buffer, pos_buffer, target_map_buffer);
                  callback(null);
              });
          }
docs: Token info dictionaries