static Properties resolveProducerProperties(Map<String, String> options, Object keySchema, Object valueSchema) {
        Properties properties = from(options);

        withSerdeProducerProperties(true, options, keySchema, properties);
        withSerdeProducerProperties(false, options, valueSchema, properties);

        return properties;
    }
@Test
    public void test_producerProperties_absentFormat() {
        assertThat(resolveProducerProperties(emptyMap()))
                .containsExactlyEntriesOf(Map.of(KEY_SERIALIZER, ByteArraySerializer.class.getCanonicalName()));
    }