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() }

				})
			}
		}
		src = src1
	case color.GrayModel:
		src1 := image.NewGray(image.Rect(0, 0, srcw, srch))
		for y := 0; y < srch; y++ {
			for x := 0; x < srcw; x++ {
				src1.SetGray(x, y, color.Gray{
					uint8((11*x + 13*y) % 0x100),
				})
			}
		}
		src = src1
	case color.RGBAModel:
		src1 := image.NewRGBA(image.Rect(0, 0, srcw, srch))
		for y := 0; y < srch; y++ {
			for x := 0; x < srcw; x++ {

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) {

                        sources {
                            put("src1", Stub(LanguageSourceSet))
                            put("src2", Stub(LanguageSourceSet))
                        }
                    }
                    bin2(BinarySpec) {
                        sources {
                            put("src1", Stub(LanguageSourceSet))
                        }
                    }
                }

                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) }

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

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

				}
				continue
			}
		}

		// Move any untransformed source bytes to the start of the buffer
		// and read more bytes.
		if r.src0 != 0 {
			r.src0, r.src1 = 0, copy(r.src, r.src[r.src0:r.src1])
		}
		n, r.err = r.r.Read(r.src[r.src1:])
		r.src1 += n
	}
}

// TODO: implement ReadByte (and ReadRune??).

// Writer wraps another io.Writer by transforming the bytes read.

				}
				continue
			}
		}

		// Move any untransformed source bytes to the start of the buffer
		// and read more bytes.
		if r.src0 != 0 {
			r.src0, r.src1 = 0, copy(r.src, r.src[r.src0:r.src1])
		}
		n, r.err = r.r.Read(r.src[r.src1:])
		r.src1 += n
	}
}

// TODO: implement ReadByte (and ReadRune??).

// Writer wraps another io.Writer by transforming the bytes read.