QList<SchedulesTableModel::Row> m_rows;
    ...
    auto rowIt = m_rows.begin();
    while (rowIt < m_rows.end()) {
        if (activeSchedules.contains(rowIt->schedule.get_id())) {
            rowIt++;
        } else {
            int index = rowIt - m_rows.begin();
            m_model->beginRemoveRows(QModelIndex(), index, index);
            rowIt = m_rows.erase(rowIt);
            m_model->endRemoveRows();
        }
    }