code: public static ClassificationDataSet loadClassification(InputStream inRaw, DataStore backingStore) throws IOException
      {
          return (ClassificationDataSet) load(inRaw, backingStore);
      }
docs: Loads in a JSAT dataset as a {@link ClassificationDataSet}. An exception
  will be thrown if the original dataset in the file was not a
  {@link ClassificationDataSet}.
  
  @param inRaw the input stream, caller should buffer it
  @param backingStore the data store to put all data points in
  @return a ClassificationDataSet object
  @throws IOException
  @throws ClassCastException if the original dataset was a not a ClassificationDataSet