then:
        action.from('script')
        action.to(target1)
        action.to(target2)
        action.execute()
    }

    void flattensCollections() {
        when:
        Object target1 = new Object()
        Object target2 = new Object()
        1 * resolver.resolveUri('script') >> file

        if (configuration == null) {
            return DynamicInvokeResult.notFound();
        }

        List<?> normalizedArgs = CollectionUtils.flattenCollections(arguments);
        if (normalizedArgs.size() == 2 && normalizedArgs.get(1) instanceof Closure) {

            }
        };
    }

    @Test
    public void init() {
        org.gradle.api.specs.CompositeSpec<Object> compositeSpec = createCompositeSpec(spec1, spec2);
        Assert.assertEquals(CollectionUtils.flattenCollections(spec1, spec2), compositeSpec.getSpecs());
    }

    protected Spec<Object>[] createAtomicElements(boolean... satisfies) {
        List<Spec<Object>> result = new ArrayList<Spec<Object>>();

            allAggregatedReports, reporting -> reporting.getReports().getEnabled()
        );
        return new LinkedHashSet<Report>(CollectionUtils.flattenCollections(Report.class, enabledReportSets));
    }

    private Set<Reporting<? extends ReportContainer<?>>> getAggregatedTasks() {
        final Set<Reporting<? extends ReportContainer<?>>> reports = new HashSet<>();