@Override
    public V get(final K key) {
        return getValueOrNull(inner.get(key));
    }
@Test
    public void shouldReturnPlainValueOnGet() {
        when(mockedKeyValueTimestampStore.get("key"))
            .thenReturn(ValueAndTimestamp.make("value", 42L));
        when(mockedKeyValueTimestampStore.get("unknownKey"))
            .thenReturn(null);

        assertThat(readOnlyKeyValueStoreFacade.get("key"), is("value"));
        assertNull(readOnlyKeyValueStoreFacade.get("unknownKey"));
    }