private ComponentSelectionState state = ComponentSelectionState.Selectable;
    private ModuleVersionResolveException metadataResolveFailure;
    private ModuleSelectors<SelectorState> selectors;
    private DependencyGraphBuilder.VisitState visitState = DependencyGraphBuilder.VisitState.NotSeen;

    private boolean rejected;
    private boolean root;

    private final List<EdgeState> unattachedDependencies = new LinkedList<>();
    private final Map<ModuleVersionIdentifier, ComponentState> versions = new LinkedHashMap<>();
    private final ModuleSelectors<SelectorState> selectors;
    private final ConflictResolution conflictResolution;
    private final ImmutableAttributesFactory attributesFactory;
    private final Comparator<Version> versionComparator;

        if (selectorFailure != null) {
            return selectorFailure;
        }
        ComponentState selectedComponent = getSelectedComponent();
        if (selectedComponent == null) {
            ModuleSelectors<SelectorState> selectors = selector.getTargetModule().getSelectors();
            for (SelectorState state : selectors) {
                selectorFailure = state.getFailure();
                if (selectorFailure != null) {