Q(Multi)Hash is missing equal_range()

QMultiHash<int, QString> h = {
    {0, "zero"},
    {1, "one"},
    {1, "uno"},
    {2, "two"},
};
auto r = h.equal_range(1);
static_assert(std::is_same_v<decltype(r.first), QMultiHash<int, QString>::iterator>);
static_assert(std::is_same_v<decltype(r.second), QMultiHash<int, QString>::iterator>);
QCOMPARE_NE(r.first, h.end());
QCOMPARE_NE(r.second, h.end());
QCOMPARE_NEW(r.first, r.second);
QCOMPARE_EQ(std::distance(r.first, r.second), 2);
QCOMPARE_EQ(r.first.key(), 1);
QCOMPARE_EQ(std::next(r.first).key(), 1);
h.erase(r.first, r.second); // QTBUG-106175
QMultiHash<int, QString> res = {{0, "zero"), {2, "two"}};
QCOMPARE_EQ(h, res);