if (failures == null) {
            failures = new ArrayList<>();
        }
        failures.add(failure);
    }

    @Override
    public FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
        if (source instanceof LocalDependencyFiles) {
            return FileCollectionStructureVisitor.VisitType.NoContents;
        }

    val file: File
)


private
class CollectingArtifactVisitor : ArtifactVisitor {
    val elements = mutableListOf<Any>()
    val artifacts = mutableSetOf<ResolvableArtifact>()

    override fun prepareForVisit(source: FileCollectionInternal.Source): FileCollectionStructureVisitor.VisitType {
        return if (source is TransformedArtifactSet) {
            // Represents artifact transform outputs. Visit the source rather than the files