AttributeMatchingExplanationBuilder NO_OP = () -> true;

    static AttributeMatchingExplanationBuilder logging() {
        return LoggingAttributeMatchingExplanationBuilder.logging();
    }

    boolean canSkipExplanation();

    default <T extends HasAttributes> void noCandidates(AttributeContainerInternal requested) {

    }

        if (LOGGER.isDebugEnabled()) {
            return INSTANCE;
        }
        return AttributeMatchingExplanationBuilder.NO_OP;
    }

    @Override
    public boolean canSkipExplanation() {
        return true;
    }

    @Override
    public <T extends HasAttributes> void noCandidates(AttributeContainerInternal requested) {
        LOGGER.debug("No candidates for {}. Select nothing.", requested);

    private static class TraceDiscardedVariants implements AttributeMatchingExplanationBuilder {

        private final Set<HasAttributes> discarded = new HashSet<>();

        @Override
        public boolean canSkipExplanation() {
            return false;
        }

        @Override
        public <T extends HasAttributes> void candidateDoesNotMatchAttributes(T candidate, AttributeContainerInternal requested) {

        CachedQuery query = CachedQuery.from(requestedAttributes, candidateList);
        int[] indices = cachedQueries.compute(query, (key, value) -> {
            if (value == null || !explanationBuilder.canSkipExplanation()) {
                int[] matches = new MultipleCandidateMatcher<>(schema, candidateList, requestedAttributes, explanationBuilder).getMatches();