connect(this, SIGNAL(rowsAboutToBeInserted(const QModelIndex &, int, int)),
this, SLOT(debug_rowsAboutToBeInserted(const QModelIndex &, int, int)));
connect(this, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
connect(this, SIGNAL(rowsAboutToBeInserted(const QModelIndex &, int, int)),
this, SLOT(debug_rowsAboutToBeInserted(const QModelIndex &, int, int)));
connect(this, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),