#include <QtCore/qobjectdefs.h>
#ifndef QOBJECTDEFS_H
template < typename T > class QReturnArgument: public QGenericReturnArgument{
   /* Some contents are skipped to improve readability */
   public: inline QReturnArgument(char const * aName, T& aData);
   /* ... */
};
#endif // QOBJECTDEFS_H