#include <QtSql/qsqldriverplugin.h>
#ifndef QSQLDRIVERPLUGIN_H
class QSqlDriverPlugin: public QObject, public QSqlDriverFactoryInterface{
   /* Some contents are skipped to improve readability */
   public: virtual struct QSqlDriver* create(class QString const & key) = 0;
   /* ... */
};
#endif // QSQLDRIVERPLUGIN_H