Initialize QMap with stream operators?

[Asperamanca]

QMap doesn't seem to have a stream operator defined for easy initialization, like so:

@
template <class Key, class T>
QMap<Key, T>& operator<<(QMap<Key, T>& map,
const QPair<Key, T>& data)
{
map.insert(data.first, data.second);
return map;
}

// Use:
static const QMap<int, QString> someMap =
QMap<int, QString>() << qMakePair(1, QString("One"))
<< qMakePair(2, QString("Two"));
@

Is there a good reason no such operator is defined in Qt?