docs: public INDArray readDataSet(String datasetName, String... groups) throws UnsupportedKerasConfigurationException {
          synchronized (Hdf5Archive.LOCK_OBJECT) {
              if (groups.length == 0)
                  return readDataSet(this.file, datasetName);
              Group[] groupArray = openGroups(groups);
              INDArray a = readDataSet(groupArray[groupArray.length - 1], datasetName);
              closeGroups(groupArray);
              return a;
          }
      }