public String toString(boolean printLeaf){
  installNodeNums(0);
  StringBuffer buff=new StringBuffer();
  dumpTree(0,0,buff);
  if (printLeaf) {
    buff.append("\n\n");
    printLeafModels(buff);
  }
  return buff.toString();
}

public String toString ( boolean printLeaf ) { installNodeNums ( 0 ) ; StringBuffer buff = new StringBuffer ( ) ; dumpTree ( 0 , 0 , buff ) ; if ( printLeaf ) { buff . append ( "\n\n" ) ; printLeafModels ( buff ) ; } return buff . toString ( ) ; }
print a textual description of the tree
