dom w3c dom Node childnode nodeimpl serialversionuid l childnode previoussibling childnode nextsibling childnode coredocumentimpl ownerdocument ownerdocument childnode node clonenode deep childnode newnode childnode super.clonenode deep newnode.previoussibling newnode.nextsibling newnode.isfirstchild newnode node getparentnode isowned ownernode nodeimpl parentnode isowned ownernode node getnextsibling nextsibling node getprevioussibling isfirstchild previoussibling childnode previoussibling isfirstchild previoussibling