then:
        resolvedDependency.getParentArtifacts(parentResolvedDependency1) == parent1SpecificArtifacts
        resolvedDependency.getParentArtifacts(parentResolvedDependency2) == parent2SpecificArtifacts
    }

    def getArtifacts() {
        when:

            }
            allModuleArtifactsCache = allArtifacts;
        }
        return allModuleArtifactsCache;
    }

    @Override
    public Set<ResolvedArtifact> getParentArtifacts(ResolvedDependency parent) {
        return sort(getArtifactsForIncomingEdge((DependencyGraphNodeResult) parent));
    }

    private Set<ResolvedArtifact> sort(ResolvedArtifactSet artifacts) {

     *
     * @param parent A parent of the ResolvedDependency. Must not be null.
     * @throws org.gradle.api.InvalidUserDataException If the parent is unknown or null
     */
    Set<ResolvedArtifact> getParentArtifacts(ResolvedDependency parent);

    /**
     * Returns the parent artifacts of this dependency. Never returns null.
     *
     * @param parent A parent of the ResolvedDependency. Must not be null.

        }

        @Override
        ResolvedArtifactSet getArtifactsForNode() {
            throw new UnsupportedOperationException()
        }

        @Override
        Set<ResolvedArtifact> getParentArtifacts(ResolvedDependency parent) {
            return null
        }

        @Override
        Set<ResolvedArtifact> getArtifacts(ResolvedDependency parent) {
            return null
        }