@Test
    public void directRemoveKey() {
        installValue(map, key, v1);
        assertEquals(v1, map.remove(key));
        postRemoveAsserts(map, key);
        assertFalse(map.containsValue(v1));
    }
This test demonstrates a retention issue in the NBHM implementation which keeps old keys around until a resize
event.
See https://github.com/JCTools/JCTools/issues/354
jctools-core/src/test/java/org/jctools/maps/NBHMRemoveTest.java