if ( isDocumentState() ) { if ( _preRoot == null ) _preRoot = new Vector();
if ( isDocumentState() ) { if ( _preRoot == null ) _preRoot = new Vector();
if ( isDocumentState() ) { if ( _preRoot == null ) _preRoot = new Vector();
if ( isDocumentState() ) { if ( _preRoot == null ) _preRoot = new Vector();
if ( ! isDocumentState() ) {