public void addChildElement(XMLElement child,boolean addAfterNewLine) throws Exception {
  addChildElementAt(child,-1,addAfterNewLine);
}

public void addChildElement ( XMLElement child , boolean addAfterNewLine ) throws Exception { addChildElementAt ( child , - 1 , addAfterNewLine ) ; }
appends the given child element to the end of the list of existing child elements .
