}
}

// RegisterCompressor registers custom compressors for a specified method ID.
// The common methods [Store] and [Deflate] are built in.
func RegisterCompressor(method uint16, comp Compressor) {
	if _, dup := compressors.LoadOrStore(method, comp); dup {
		panic("compressor already registered")
	}
}

func compressor(method uint16) Compressor {
	ci, ok := compressors.Load(method)
	if !ok {
		return nil
	}

	ISEL	CR1EQ,R3,R4,R3
	RET

	PCALIGN	$16
cmp4:	// 4 - 7B
	CMP	R9,$4
	BLT	cmp2
	ANDCC	$3,R9,R9
	_LWBEX	(R0)(R5),R10
	_LWBEX	(R0)(R6),R11
	_LWBEX	(R9)(R5),R12
	_LWBEX	(R9)(R6),R14
	RLDIMI	$32,R10,$0,R12
	RLDIMI	$32,R11,$0,R14
	CMPU	R12,R14
	BR	cmp0

	PCALIGN $16
cmp2:	// 2 - 3B
	CMP	R9,$2
	BLT	cmp1
	ANDCC	$1,R9,R9
	_LHBEX	(R0)(R5),R10
	_LHBEX	(R0)(R6),R11

		t.Skip("skipping during short test")
	}
	maxprocs := runtime.GOMAXPROCS(3)
	compl := make(chan bool, 2)
	go func() {
		for i := 0; i != 1000; i += 1 {
			runtime.GC()
		}
		compl <- true
	}()
	go func() {
		for i := 0; i != 1000; i += 1 {
			runtime.GOMAXPROCS(3)
		}
		compl <- true
	}()
	go perpetuumMobile()
	<-compl
	<-compl
	stop <- true
	runtime.GOMAXPROCS(maxprocs)
}

  x:U:1 -> x:U:1 - Could not resolve x:U:1.
"""
    }

    private void node(String module, ComponentSelectionReason reason = ComponentSelectionReasons.requested()) {
        DummyModuleVersionSelection moduleVersion = comp(module, reason)
        builder.startVisitComponent(moduleVersion.resultId, moduleVersion.selectionReason, "repo")
        builder.visitComponentDetails(moduleVersion.componentId, moduleVersion.moduleVersion)

		if err != nil {
			return nil, err
		}

		// Pick output column names
		if expr.As != "" {
			output, err = output.Set(expr.As, v)
		} else if comp, ok := getLastKeypathComponent(expr.Expression); ok {
			output, err = output.Set(comp, v)
		} else {
			output, err = output.Set(fmt.Sprintf("_%d", i+1), v)
		}
		if err != nil {
			return nil, err
		}
	}

	// Update count of records output.

	}
	sort.Slice(aBlocks, func(i, j int) bool {
		if aBlocks[i].Type < aBlocks[j].Type {
			return true
		} else if aBlocks[i].Type == aBlocks[j].Type {
			comp := bytes.Compare(aBlocks[i].Bytes, aBlocks[j].Bytes)
			return comp <= 0
		} else {
			return false
		}
	})

	bBlocks := []*pem.Block{}
	for {
		block, b = pem.Decode(b)
		if block == nil {
			break
		}

	(Int64Make
		(Xor32 <typ.UInt32> (Int64Hi x) (Int64Hi y))
		(Xor32 <typ.UInt32> (Int64Lo x) (Int64Lo y)))

(Neg64 <t> x) => (Sub64 (Const64 <t> [0]) x)

(Com64 x) =>
	(Int64Make
		(Com32 <typ.UInt32> (Int64Hi x))
		(Com32 <typ.UInt32> (Int64Lo x)))

// Sadly, just because we know that x is non-zero,
// we don't know whether either component is,
// so just treat Ctz64NonZero the same as Ctz64.

func BuildMultiClusterComponent[T ComponentConstraint](c ComponentBuilder, constructor func(cluster *Cluster) T) *Component[T] {
	comp := &Component[T]{
		constructor: constructor,
		clusters:    make(map[cluster.ID]T),
	}
	c.registerHandler(comp)
	return comp
}

func (c *Controller) registerHandler(h handler) {

        app.library.headerFiles*.writeToDir(file("src/helloApi"))
        app.library.sourceFiles*.writeToDir(file("src/hello"))

        and:
        buildFile << """
model {
    components { comp ->
        helloApi(NativeLibrarySpec)
        hello(NativeLibrarySpec) {
            sources {
                cpp.lib ${notation}
            }
        }
        main(NativeExecutableSpec) {
            sources {

	// hand-written.
	tests := []struct {
		name      string
		info      []byte
		addrSize  int
		byteOrder binary.ByteOrder
	}{
		{
			"32-bit little",
			[]byte{0x30, 0, 0, 0, // comp unit length
				4, 0, // DWARF version 4
				0, 0, 0, 0, // abbrev offset
				8, // address size
				0,
				0, 0, 0, 0, 0, 0, 0, 0,
				0, 0, 0, 0, 0, 0, 0, 0,
				0, 0, 0, 0, 0, 0, 0, 0,