@Override
    public Boolean getOptional() {
        return dependency.getOptional();
    }

    @Nonnull
    @Override
    public Collection<Exclusion> getExclusions() {
        return new MappedCollection<>(dependency.getExclusions(), this::toExclusion);
    }

    private Exclusion toExclusion(org.eclipse.aether.graph.Exclusion exclusion) {
        return new Exclusion() {
            @Nullable

    @Override
    public Boolean getOptional() {
        return dependency.getOptional();
    }

    @Nonnull
    @Override
    public Collection<Exclusion> getExclusions() {
        return new MappedCollection<>(dependency.getExclusions(), this::toExclusion);
    }

    private Exclusion toExclusion(org.eclipse.aether.graph.Exclusion exclusion) {
        return new Exclusion() {
            @Nullable
            @Override