question: @ Override public String leaveDTD ( ) { if ( _writer == _dtdWriter ) { _line . append ( _text ) ; _text = new StringBuffer ( 20 ) ; flushLine ( false ) ; _writer = _docWriter ; return _dtdWriter . toString ( ) ; } return null ; }
target:  Called by the root element to leave DTD mode and if any DTD parts were printer, will return a string with their textual content.