public String prefix() throws Exception {
  StringBuffer text;
  text=new StringBuffer();
  if (m_isLeaf) {
    text.append("[" + m_localModel.dumpLabel(0,m_train) + "]");
  }
 else {
    prefixTree(text);
  }
  return text.toString();
}

public String prefix ( ) throws Exception { StringBuffer text ; text = new StringBuffer ( ) ; if ( m_isLeaf ) { text . append ( "[" + m_localModel . dumpLabel ( 0 , m_train ) + "]" ) ; } else { prefixTree ( text ) ; } return text . toString ( ) ; }
returns tree in prefix order .
