Implement a findItems() by data in QStandardItemModel

In QStandardItemModel there is already a function with this signature:
QList<QStandardItem *> findItems ( const QString & text, Qt::MatchFlags flags = Qt::MatchExactly, int column = 0 ) const

However, it would be very practical to have a data/role-based way of searching for items, for comparison QComboBox has these functions:
int findData ( const QVariant & data, int role = Qt::UserRole, Qt::MatchFlags flags = Qt::MatchExactly | Qt::MatchCaseSensitive ) const
int findText ( const QString & text, Qt::MatchFlags flags = Qt::MatchExactly | Qt::MatchCaseSensitive ) const

So what I would like is a similar function for QStandardItemModel with the signature:
QList<QStandardItem *> findItems ( const QVariant & data, int role = Qt::UserRole, Qt::MatchFlags flags = Qt::MatchExactly, int column = 0 ) const

The overall function would be the same, only the matching of items would be different. This probably applies to QTreeWidget, QListWidget and QTableWidget as well as I see they have the findItems method, but personally I only case about the QStandardItemModel. P.S. For Qt5 you should clean up if Qt::MatchCaseSensitive should be in the default or not so that it's consistent.