#include <QtSql/qsqlrelationaltablemodel.h>
#ifndef QSQLRELATIONALTABLEMODEL_H
class QSqlRelation{
   /* Some contents are skipped to improve readability */
   public: inline QSqlRelation(class QString const & aTableName, class QString const & indexCol, class QString const & displayCol);
   /* ... */
};
#endif // QSQLRELATIONALTABLEMODEL_H