@Override public long get(long key1, long key2) {
        assert key1 != unassignedSentinel : "get() called with key1 == nullKey1 (" + unassignedSentinel + ')';
        return super.get0(key1, key2);
    }
@Test
    public void testGet() {
        final long key1 = randomKey();
        final long key2 = randomKey();
        final SlotAssignmentResult slot = hsa.ensure(key1, key2);

        final long valueAddress2 = hsa.get(key1, key2);
        assertEquals(slot.address(), valueAddress2);
    }