VIn deserializeValue(final String topic, final Headers headers, final byte[] data) {
        return valDeserializer.deserialize(topic, headers, data);
    }
@Test
    public void shouldProvideTopicHeadersAndDataToValueDeserializer() {
        final SourceNode<String, String> sourceNode = new MockSourceNode<>(new TheDeserializer(), new TheDeserializer());
        final RecordHeaders headers = new RecordHeaders();
        final String deserializedValue = sourceNode.deserializeValue("topic", headers, "data".getBytes(StandardCharsets.UTF_8));
        assertThat(deserializedValue, is("topic" + headers + "data"));
    }