code: public ComputationGraph fitMultiDataSet(JavaRDD<MultiDataSet> rdd) {
          if (Nd4j.getExecutioner() instanceof GridExecutioner)
              ((GridExecutioner) Nd4j.getExecutioner()).flushQueue();
  
          trainingMaster.executeTrainingMDS(this, rdd);
          network.incrementEpochCount();
          return network;
      }
docs: Fit the ComputationGraph with the given data set
  
  @param rdd Data to train on
  @return Trained network