#include <QtGui/qproxymodel.h>
#ifndef QPROXYMODEL_H
#ifndef QT_NO_PROXYMODEL
class QProxyModel: public QAbstractItemModel{
   /* Some contents are skipped to improve readability */
   protected: QProxyModel(struct QProxyModelPrivate&, class QObject* parent = 0);
   /* ... */
};
#endif // QT_NO_PROXYMODEL
#endif // QPROXYMODEL_H