Checking if a row in a tableview is filtered when using a QSortFilterProxyModel

[snydesc]

I have a tableview that uses a QSortFilterProxyModel. If I call tableView.isRowHidden() on a row that was filtered it will return false. I would have expected it to return true since the row is hidden. I could not find a isRowFiltered() function anywhere. How can I tell if a row is filtered within my table?