code: @Override
      public void setNewNumberOfLabels(int labels) {
          int examples = numExamples();
          INDArray newOutcomes = Nd4j.create(examples, labels);
          setLabels(newOutcomes);
      }
docs: Clears the outcome matrix setting a new number of labels
  
  @param labels the number of labels/columns in the outcome matrix
  Note that this clears the labels for each example