LOGGER.debug("Candidate {} attribute {} value {} doesn't requested value {}", candidate, attribute, candidateValue, requestedValue);
    }

    @Override
    public <T extends HasAttributes> void candidateAttributeMissing(T candidate, Attribute<?> attribute, Object requestedValue) {
        LOGGER.debug("Candidate {} doesn't have attribute {}", candidate, attribute);
    }

    @Override

    default <T extends HasAttributes> void candidateAttributeDoesNotMatch(T candidate, Attribute<?> attribute, Object requestedValue, AttributeValue<?> candidateValue) {

    }

    default <T extends HasAttributes> void candidateAttributeMissing(T candidate, Attribute<?> attribute, Object requestedValue) {

    }

    default <T extends HasAttributes> void candidateIsSuperSetOfAllOthers(T candidate) {

    }

        if (!candidateValue.isPresent()) {
            setCandidateValue(c, a, null);
            explanationBuilder.candidateAttributeMissing(candidates.get(c), attribute, requestedValue);
            return MatchResult.MISSING;
        }

        Object coercedValue = candidateValue.coerce(attribute);
        setCandidateValue(c, a, coercedValue);