769     _firstChild( 0 ), _lastChild( 0 ),  in XMLNode()
818     while( _firstChild ) {  in DeleteChildren()
820         DeleteChild( _firstChild );  in DeleteChildren()
822     _firstChild = _lastChild = 0;  in DeleteChildren()
831     if ( child == _firstChild ) {  in Unlink()
832         _firstChild = _firstChild->_next;  in Unlink()
873         TIXMLASSERT( _firstChild );  in InsertEndChild()
882         TIXMLASSERT( _firstChild == 0 );  in InsertEndChild()
883         _firstChild = _lastChild = addThis;  in InsertEndChild()
902     if ( _firstChild ) {  in InsertFirstChild()
904         TIXMLASSERT( _firstChild->_prev == 0 );  in InsertFirstChild()
906         _firstChild->_prev = addThis;  in InsertFirstChild()
907         addThis->_next = _firstChild;  in InsertFirstChild()
908         _firstChild = addThis;  in InsertFirstChild()
914         _firstChild = _lastChild = addThis;  in InsertFirstChild()
964     for( const XMLNode* node = _firstChild; node; node = node->_next ) {  in FirstChildElement()