formatter.startChildren();
        for (AssessedCandidate assessedCandidate : failure.getCandidates()) {
            formatter.node(assessedCandidate.getDisplayName());
            formatAttributeMatchesForIncompatibility(assessedCandidate, formatter, describer);
        }
        formatter.endChildren();
        return formatter.toString();
    }

        AttributeDescriber describer
    ) {
        formatter.node("Configuration '");
        formatter.append(assessedCandidate.getDisplayName());
        formatter.append("'");

        formatAttributeMatchesForIncompatibility(assessedCandidate, formatter, describer);
    }

        AttributeDescriber describer
    ) {
        formatter.node("Variant '");
        formatter.append(assessedCandidate.getDisplayName());
        formatter.append("'");
        formatAttributeMatchesForIncompatibility(assessedCandidate, formatter, describer);
    }

    private enum FailureSubType {
        NO_VARIANTS_EXIST,
        NO_VARIANTS_HAVE_ATTRIBUTES,
        NO_VARIANT_MATCHES_REQUESTED_ATTRIBUTES;

        }
        formatter.startChildren();
        formatAttributeSection(formatter, "Unmatched attribute", other);
        formatter.endChildren();
    }

    protected void formatAttributeMatchesForIncompatibility(
        AssessedCandidate assessedCandidate,
        TreeFormatter formatter,
        AttributeDescriber describer
    ) {