@get:Input
    abstract val baseVersion: Property<String>

    @get:Input
    @get:Optional
    abstract val commitId: Property<String>

    @get:Input
    abstract val snapshot: Property<Boolean>

    @get:Input
    abstract val promotionBuild: Property<Boolean>

    @get:Input
    @get:Optional
    abstract val buildTimestamp: Property<Date>

    @get:OutputDirectory

    public boolean isSelectedVersionKnown() throws OverConstrainedVersionException {
        return artifact.isSelectedVersionKnown();
    }

    /** {@inheritDoc} */
    public void setOptional(boolean optional) {
        artifact.setOptional(optional);
    }

    /** {@inheritDoc} */
    public int hashCode() {
        int result = 17;

        result = 37 * result + getGroupId().hashCode();

    void setRelease(boolean release);

    List<ArtifactVersion> getAvailableVersions();

    void setAvailableVersions(List<ArtifactVersion> versions);

    boolean isOptional();

    void setOptional(boolean optional);

    ArtifactVersion getSelectedVersion() throws OverConstrainedVersionException;

    boolean isSelectedVersionKnown() throws OverConstrainedVersionException;

    interface Parameters : ValueSourceParameters {

        val ignoreIncomingBuildReceipt: Property<Boolean>

        @get:Optional
        val buildReceiptFileContents: Property<String>
    }

    override fun obtain(): String? = parameters.run {
        buildReceiptString()
            ?.let(BuildReceipt::readBuildReceiptFromString)

    }

    @Override
    public boolean isSelectedVersionKnown() throws OverConstrainedVersionException {
        return versionRange.isSelectedVersionKnown(this);
    }

    @Override
    public void setOptional(boolean optional) {
        this.optional = optional;
    }