// don't need a deep copy, they don't get modified or added/removed to/from - but make them unmodifiable to be
        // sure!
        if (project.getDependencyArtifacts() != null) {
            setDependencyArtifacts(Collections.unmodifiableSet(project.getDependencyArtifacts()));
        }

        if (project.getArtifacts() != null) {
            setArtifacts(Collections.unmodifiableSet(project.getArtifacts()));
        }