/**
 * Add a dependency.
 *
 * @param files files to add as a dependency
 * @since 8.6
 */
operator fun DependencyCollector.invoke(files: FileCollection) = add(files)


/**
 * Add a dependency.
 *
 * @param files files to add as a dependency

                    if (symbol.isActual) add(KtTokens.ACTUAL_KEYWORD)
                    if (symbol.isExpect) add(KtTokens.EXPECT_KEYWORD)
                }

                if (symbol is KaFunctionSymbol) {
                    if (symbol.isExternal) add(KtTokens.EXTERNAL_KEYWORD)
                    if (symbol.isOverride) add(KtTokens.OVERRIDE_KEYWORD)
                    if (symbol.isInline) add(KtTokens.INLINE_KEYWORD)

            boolean isSatisfiedBy(String element) {
                return element != "c"
            }
        }

        given:
        container.add("a")
        container.add("b")
        container.add("c")
        container.add(new StringBuffer("d"))

        def collection = container.matching(spec).withType(String.class).matching(spec2);

        expect:
        toList(collection) == ["a"]

        when:
        mutate {
            add 'foo'
            add 'bar'
            remove 'foo'
        }

        then:
        def list = registry.realize(collectionPath, collectionType)
        list == checkable(['bar'])
    }

    def "can remove all elements"() {
        when:
        mutate {
            add 'foo'
            add 'bar'
            clear()
        }

    def "can add empty set to singleton set"() {
        def action = Mock(Action)

        expect:
        def set = ImmutableActionSet.empty().add(action)
        set.add(ImmutableActionSet.empty()).is(set)
    }

    def "can add duplicate action to singleton set"() {
        def action = Mock(Action)

        expect:
        def set = ImmutableActionSet.empty().add(action)
        set.add(action).is(set)

        registration.add(GradleEnterpriseAutoAppliedPluginRegistry.class);
        registration.add(GradleEnterprisePluginAutoAppliedStatus.class);
        registration.add(DefaultGradleEnterprisePluginServiceRef.class);
        registration.add(DefaultGradleEnterprisePluginBuildState.class);
        registration.add(DefaultGradleEnterprisePluginConfig.class);

	f3 := func() { println("blek") }
	f4 := func() { println("blub") }
	f5 := func() { println("blat") }
	exithook.Add(exithook.Hook{F: f1})
	exithook.Add(exithook.Hook{F: f2, RunOnFailure: true})
	exithook.Add(exithook.Hook{F: f3})
	exithook.Add(exithook.Hook{F: f4, RunOnFailure: true})
	exithook.Add(exithook.Hook{F: f5})
	os.Exit(1)
}

func testPanics() {
	f1 := func() { println("ok") }

        b.addLink c

        when:
        graph.add(a)
        graph.add(b)
        graph.add(c)
        graph.addListener(listener)

        then:
        1 * listener.onDiscovered(b)
        1 * listener.onDiscovered(c)
        0 * listener.onDiscovered(_)

        when:
        graph.add(d)
        graph.add(e)
        graph.add(f)

        then:
        1 * listener.onDiscovered(d)

        container.realizeNow()

        when:
        container.add(Stub(SwiftBinary))

        then:
        def e = thrown(IllegalStateException)
        e.message == 'Cannot add an element to this collection as it has already been realized.'
    }

    def "cannot add elements while collection is realizing"() {
        given:
        container.add(Stub(SwiftBinary))

    }

    @Override
    public void add(String problem) {
        problems.add(problem);
    }

    @Override
    public void add(Field field, String problem) {
        problems.add(field, problem);
    }

    @Override
    public void add(WeaklyTypeReferencingMethod<?, ?> method, String problem) {
        add(method.getMethod(), problem);
    }

    @Override