@Override public String toString(){
  String res=super.toString();
  res+=String.format("cluster context fraction: %f%n",m_clusterContextFraction);
  return res;
}

@ Override public String toString ( ) { String res = super . toString ( ) ; res += String . format ( "cluster context fraction: %f%n" , m_clusterContextFraction ) ; return res ; }
override tostring for printing out the cluster context fraction .
