// already loading
    DummyEntry<Object, Object> entry = DummyEntry.create(key, hash, null);
    DummyValueReference<Object, Object> valueRef = DummyValueReference.create(null);
    valueRef.setLoading(true);
    entry.setValueReference(valueRef);
    table.set(index, entry);
    assertNull(segment.refresh(key, hash, identityLoader(), false));
  }

  // Removal listener tests