"\nSize of the tree : " + numNodes();
"\nSize of the tree : " + numNodes() + (getMaxDepth() > 0 ? ("\nMax depth of tree: " + getMaxDepth()) : (""));
  public String toString() {        if (m_Successors == null) {      return "RandomTree: no model has been built yet.";    } else {      return     	"\nRandomTree\n==========\n" + toString(0) + "\n" +	"\nSize of the tree : " + numNodes();    }  }