No such signal QStandardItemModel::itemChanged(QStandardItem *item )

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Hi,

I saw in a documentation:

Signals: void itemChanged ( QStandardItem * item )

But when I write:

QStandardItemModel *model;
connect(model, SIGNAL(itemChanged(QStandardItem *item )), this, SLOT(updatePanel(QStandardItem*)));

QStandardItemModel *model;
connect(model, SIGNAL(itemChanged(QStandardItem *item )), this, SLOT(updatePanel(QStandardItem*)));

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It doesn't work:

No such signal QStandardItemModel::itemChanged(QStandardItem *item ) in...

Thank you!