}

    public static <T> List<T> toList(T[] things) {
        if (things == null || things.length == 0) {
            return new ArrayList<T>(0);
        }

        List<T> list = new ArrayList<T>(things.length);
        Collections.addAll(list, things);
        return list;
    }

    public static <T> Set<T> toSet(Iterable<? extends T> things) {
        if (things == null) {
            return new HashSet<T>(0);

                into buildDir
            }
        """

        when:
        run "resolveIt"

        then:
        output.count("before :things") == 1
        output.count("after :things") == 1
    }

    @Issue("https://issues.gradle.org/browse/GRADLE-2047")
    def "can access resolved files from afterResolve hook"() {
        given:
        file("thing.txt") << "stuff"

    }

    /**
     * Recursively unpacks all the given things into a flat list.
     *
     * Nulls are not removed, they are left intact.
     *
     * @param things The things to flatten
     * @return A flattened list of the given things
     */
    public static List<?> flattenCollections(Object... things) {
        return flattenCollections(Object.class, things);
    }

    /**

            }
            extensions.add('things', SomeThing)
            things {
                letter = 'a'
                withLetter('b')
            }
            assert things.letter == Letter.B
            things.other('ABC')
            assert things.letter == Letter.A
            things.other(Letter.C)
            assert things.letter == Letter.C
            things.other('A', 'ignore')

        when:
        def libDir = file('libs').createDir()
        jarWithClasses(libDir.file("somelib.jar"), Thing: 'interface Thing {}')
        def anotherJar = libDir.file("anotherlib.jar")
        jarWithClasses(anotherJar, Thing2: 'interface Thing2 {}')
        file("src/main/java/Foo.java") << "class Foo implements Thing, Thing2{}"
        buildFile << """
            dependencies {
                implementation fileTree("libs/")

        def model = withConnection { connection ->
            connection.model(CustomModel).get()
        }

        then:
        model.thing.is(model.thing)
        model.things[0].is(model.thing)
        model.thingsByName.child.is(model.thing)
        model.findThing("child").is(model.thing)
    }

    def "retains underlying object identity in model returned to client via build action"() {
        settingsFile << "include 'a', 'b'"

        def a = java "@Thing class A {}"
        outputs.snapshot { succeeds "compileJava" }

        when:
        a.text = "@Thing class A { void foo() {} }"

        then:
        succeeds "compileJava", "--info"

        and:
        outputContains("Full recompilation is required because the generated type 'AThing' must have exactly one originating element, but had 0.")
    }

        buildFile """
            class Things {
                class Thing { }
            }

            extensions.create("thing", Things.Thing, "a")
        """

        expect:
        fails()
        failure.assertHasCause("Could not create an instance of type Things\$Thing.")
        failure.assertHasCause("Class Things.Thing is a non-static inner class.")
    }

        when:
        builder.create(target).generate()

        then:
        assertOutputFile("""$COMMON_START
 */

// Call method
things.element1.thing(12, things.nested.element2)

// Set property
prop = things.nested.element2

other = extendsFrom(things.nested.element2.outputDir)
""")
    }

    def "can add further configuration"() {
        given:
        builder

        then:
        assertOutputFile("""/*
 * This file was generated by the Gradle 'init' task.
 */

// Call method
things["element1"].thing(12, things.nested["element2"])

// Set property
prop = things.nested["element2"]

other = extendsFrom(things.nested["element2"].outputDir)
""")
    }

    def "can add further configuration"() {
        given:
        builder