#include <QtGui/qundogroup.h>
#ifndef QUNDOGROUP_H
#ifndef QT_NO_UNDOGROUP
class QUndoGroup: public QObject{
   /* Some contents are skipped to improve readability */
   public: bool isClean() const
   /* ... */
};
#endif // QT_NO_UNDOGROUP
#endif // QUNDOGROUP_H