nodes.add(selected)
                    visitDeps(selected.deps, nodes, seen)
                }
            }
        }

        Set<ExpectedArtifact> getArtifactNodes() {
            Set<NodeBuilder> result = new LinkedHashSet<>()
            visitNodes(this.root, result)
            return result.collect { it.artifacts }.flatten()
        }

        Set<String> getFiles() {