@Override
    public void delete(final String key) {
        client.getKVClient().delete(ByteSequence.from(key, StandardCharsets.UTF_8), DeleteOption.newBuilder().isPrefix(true).build());
    }
@Test
    void assertDelete() {
        repository.delete("key");
        verify(kv).delete(any(ByteSequence.class), any(DeleteOption.class));
    }