@Override public String toString(){
  return "SparseFeatureStore{" + "instanceList=" + instanceList + ", outcomeList="+ outcomeList+ ", weightList="+ weightList+ ", sequenceIds="+ sequenceIds+ ", sequencePositions="+ sequencePositions+ ", addingAnotherInstancesAllowed="+ addingAnotherInstancesAllowed+ ", totalNonNullFeaturesCount="+ totalNonNullFeaturesCount+ '}';
}

@ Override public String toString ( ) { return "SparseFeatureStore{" + "instanceList=" + instanceList + ", outcomeList=" + outcomeList + ", weightList=" + weightList + ", sequenceIds=" + sequenceIds + ", sequencePositions=" + sequencePositions + ", addingAnotherInstancesAllowed=" + addingAnotherInstancesAllowed + ", totalNonNullFeaturesCount=" + totalNonNullFeaturesCount + '}' ; }
primarily for debug purposes
