AssessedCandidate assessedCandidate,
        TreeFormatter formatter,
        AttributeDescriber describer
    ) {
        // None of the nullability warnings are relevant here because the attribute values are only retrieved from collections that will contain them
        @SuppressWarnings("DataFlowIssue") Map<Attribute<?>, ?> compatibleAttrs = assessedCandidate.getCompatibleAttributes().stream()

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

    private final Collection<? extends Capability> requestedCapabilities;
    private final List<AssessedCandidate> candidates;
    private final ModuleVersionIdentifier targetComponentId;

    public NoMatchingCapabilitiesFailure(String requestedName, Collection<? extends Capability> requestedCapabilities, List<AssessedCandidate> candidates, ModuleVersionIdentifier targetComponentId) {
        super(requestedName);

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

        Map<String, ResolutionCandidateAssessor.AssessedCandidate> ambiguousVariants = summarizeAmbiguousVariants(failure, describer, formatter, true);

        // We're sorting the names of the variants and later attributes
        // to make sure the output is consistently the same between invocations
        formatter.startChildren();
        for (ResolutionCandidateAssessor.AssessedCandidate assessedCandidate : ambiguousVariants.values()) {

            .append(failure.getRequestedName())
            .append(" were selected:\n");
        for (AssessedCandidate assessedCandidate : failure.getAssessedCandidates()) {
            sb.append("   - Variant ").append(assessedCandidate.getDisplayName()).append(" has attributes ");
            formatAttributes(sb, assessedCandidate.getAllCandidateAttributes());
            sb.append("\n");
        }
        return sb.toString();
    }

        formatUnselectable(assessedCandidate, formatter, describer);
        return formatter.toString();
    }

    private void formatUnselectable(
        AssessedCandidate assessedCandidate,
        TreeFormatter formatter,
        AttributeDescriber describer
    ) {
        formatter.node("Configuration '");
        formatter.append(assessedCandidate.getDisplayName());
        formatter.append("'");

import java.util.List;

/**
 * A {@link ResolutionFailure} that represents the situation when multiple incompatible variants of a single component
 * are selecting during a request.
 */
public final class IncompatibleMultipleNodeSelectionFailure extends AbstractVariantSelectionFailure {
    private final ImmutableList<AssessedCandidate> assessedCandidates;

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

    private final ImmutableList<ResolutionCandidateAssessor.AssessedCandidate> candidates;

    public IncompatibleResolutionFailure(String requestedName, AttributeContainerInternal requestedAttributes, List<ResolutionCandidateAssessor.AssessedCandidate> candidates) {
        super(requestedName, requestedAttributes);
        this.candidates = ImmutableList.copyOf(candidates);
    }