docs: public static INDArray reshapeVectorToTimeSeriesMask(INDArray timeSeriesMaskAsVector, int minibatchSize) {
          if (!timeSeriesMaskAsVector.isVector())
              throw new IllegalArgumentException("Cannot reshape mask: expected vector");
  
          val timeSeriesLength = timeSeriesMaskAsVector.length() / minibatchSize;
  
          return timeSeriesMaskAsVector.reshape('f', minibatchSize, timeSeriesLength);
      }