func (s Src5[T]) Next() {
	var x interface{} = s
	_ = (x.(Src5[T]))()
}

func main() {
	var src1 Src1[int]
	src1.Next()

	var src2 Src2[int]
	src2.Next()

	var src3 Src3[string]
	src3.Next()

	var src4 Src4[int]
	src4.Next()

	var src5 Src5[int]
	src5.Next()

        ["src1", "src2"]| _             | _                 | "from() after convention honors it"           | { it.convention("src1"); it.from("src2") }
        ["src2"]        | _             | _                 | "from() before convention prevents it"        | { it.from("src2"); it.convention("src1") }
        ["src1", "src2"]| _             | ["src1"]          | "from() commits convention"                   | { it.from("src2"); it.unsetConvention() }

func TestCopyStrings(t *testing.T) {
	var src1 []string
	dest1 := CopyStrings(src1)

	if !reflect.DeepEqual(src1, dest1) {
		t.Errorf("%v and %v are not equal", src1, dest1)
	}

	src2 := []string{}
	dest2 := CopyStrings(src2)

	if !reflect.DeepEqual(src2, dest2) {
		t.Errorf("%v and %v are not equal", src2, dest2)
	}

	src3 := []string{"a", "c", "b"}
	dest3 := CopyStrings(src3)

	if !reflect.DeepEqual(src3, dest3) {

FileCollection collection = layout.files('src/file1.txt',
                                  new File('src/file2.txt'),
                                  ['src/file3.csv', 'src/file4.csv'],
                                  Paths.get('src', 'file5.txt'))
// end::simple-params[]

file('src').mkdirs()
file('src/dir1').mkdirs()
file('src/file1.txt').mkdirs()
file('src2').mkdirs()
file('src2/dir1').mkdirs()
file('src2/dir2').mkdirs()

// tag::simple-params[]
val collection: FileCollection = layout.files(
    "src/file1.txt",
    File("src/file2.txt"),
    listOf("src/file3.csv", "src/file4.csv"),
    Paths.get("src", "file5.txt")
)
// end::simple-params[]

file("src").mkdirs()
file("src/dir1").mkdirs()
file("src/file1.txt").mkdirs()
file("src2").mkdirs()
file("src2/dir1").mkdirs()
file("src2/dir2").mkdirs()

// tag::closure[]
tasks.register("list") {

Contents of src
src/dir1
src/file1.txt
Contents of src2
src2/dir1

                targetMachines = [machines.host().x86, machines.host().x86_64]
            }
        """
        def headerDir = file('src/main/headers')
        def apiHeaderDir = file('src/main/public')
        def src1 = file('src/main/cpp/lib.cpp').createFile()
        def src2 = file('src/main/cpp/lib-impl.cpp').createFile()

        when:
        def project = withConnection { connection -> connection.getModel(CppProject.class) }

        """
        buildFile << """
            apply plugin: 'cpp-library'
        """
        def headerDir = file('src/main/headers')
        def apiHeaderDir = file('src/main/public')
        def src1 = file('src/main/cpp/lib.cpp').createFile()
        def src2 = file('src/main/cpp/lib-impl.cpp').createFile()

        when:
        def project = withConnection { connection -> connection.getModel(CppProject.class) }

Source dirs: [src, src2]...

        }
        return getModelId() + " " + getLocation();
    }

    public static InputSource merge(InputSource src1, InputSource src2) {
        return new InputSource(Stream.concat(src1.sources(), src2.sources()).collect(Collectors.toSet()));
    }