public void addNodesInDocOrder(NodeIterator iterator,XPathContext support){
  if (!m_mutable)   throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NODESET_NOT_MUTABLE,null));
  Node node;
  while (null != (node=iterator.nextNode())) {
    addNodeInDocOrder(node,support);
  }
}

public void addNodesInDocOrder ( NodeIterator iterator , XPathContext support ) { if ( ! m_mutable ) throw new RuntimeException ( XSLMessages . createXPATHMessage ( XPATHErrorResources . ER_NODESET_NOT_MUTABLE , null ) ) ; Node node ; while ( null != ( node = iterator . nextNode ( ) ) ) { addNodeInDocOrder ( node , support ) ; } }
copy nodelist members into this nodelist , adding in document order . if a node is null , don ' t add it .
