code: public void overrideMinorityDefault(int index) {
          if (targetMinorityDistMap.containsKey(index)) {
              minorityLabelMap.put(index, 0);
          } else {
              throw new IllegalArgumentException(
                              "Index specified is not contained in the target minority distribution map specified with the preprocessor. Map contains "
                                              + ArrayUtils.toString(targetMinorityDistMap.keySet().toArray()));
          }
      }
docs: Will change the default minority label from "1" to "0" and correspondingly the majority class from "0" to "1"
  for the label at the index specified