}
    }

    @Nullable
    ExcludeSpec getTransitiveExclusions() {
        return transitiveExclusions;
    }

    public void markUnattached() {
        this.unattached = true;
    }

    public void markAttached() {
        this.unattached = false;
    }

    public boolean isUnattached() {
        return unattached;
    }

    void markUsed() {

    }

    public void addUnattachedDependency(EdgeState edge) {
        unattachedDependencies.add(edge);
        edge.markUnattached();
    }

    public void removeUnattachedDependency(EdgeState edge) {
        if (unattachedDependencies.remove(edge)) {
            edge.markAttached();
        }
    }

    public ComponentState getVersion(ModuleVersionIdentifier id, ComponentIdentifier componentIdentifier) {