QPluginLoader pl(pluginfile);
        if (!pl.load()) {
            qDebug() <<  pluginfile <<  pl.errorString();
        }
        else {
            QObject *instance = pl.instance();
            if (!instance) {
                qDebug() << instance is NULL " <<  pluginfile;
            }
            else {
                qDebug() <<  "plugin: " << pluginfile;
                printf("address: 0x%zx\n",(intptr_t)instance);
                qDebug() << instance->objectName();
        }