@Override
  public R transform(final K readOnlyKey, final GenericRow value) {
    return delegate.transform(
        readOnlyKey,
        value,
        context.orElseThrow(() -> new IllegalStateException("Not initialized"))
    );
  }
@Test
  public void shouldInvokeInnerTransformer() {
    // When:
    ksTransformer.transform(KEY, VALUE);

    // Then:
    verify(ksqlTransformer).transform(
        eq(KEY),
        eq(VALUE),
        any()
    );
  }