func NopCloser(r io.Reader) io.ReadCloser {
	return io.NopCloser(r)
}

// Discard is an io.Writer on which all Write calls succeed
// without doing anything.
//
// Deprecated: As of Go 1.16, this value is simply [io.Discard].

		Delay: make([]int, 1),
	}
	if err := EncodeAll(io.Discard, g0); err == nil {
		t.Error("expected error from mismatched delay and image slice lengths")
	}

	g1 := &GIF{
		Image:    images,
		Delay:    make([]int, len(images)),
		Disposal: make([]byte, 1),
	}
	for i := range g1.Disposal {
		g1.Disposal[i] = DisposalNone
	}
	if err := EncodeAll(io.Discard, g1); err == nil {

    /**
     * Sets the value of the property to the given value, replacing whatever value the property already had.
     *
     * <p>
     * This method can also be used to discard the value of the property, by passing it {@code null}. When the
     * value is discarded (or has never been set in the first place), the convention (default value) for this

	backend.Config.ErrorLog = log.New(io.Discard, "", 0)

	backendURL, err := url.Parse(backend.URL)
	if err != nil {
		t.Fatal(err)
	}

	proxyHandler := NewSingleHostReverseProxy(backendURL)

	// Discards errors of the form:
	// http: proxy error: read tcp 127.0.0.1:44643: use of closed network connection
	proxyHandler.ErrorLog = log.New(io.Discard, "", 0)

	frontend := httptest.NewServer(proxyHandler)

	binArch := base.Clone()
	binArch.Filter(func(name string) bool {
		// Discard bin/ for now, will add back later.
		if strings.HasPrefix(name, "bin/") {
			return false
		}
		// Discard most of pkg.
		if strings.HasPrefix(name, "pkg/") {
			// Keep pkg/include.
			if strings.HasPrefix(name, "pkg/include/") {
				return true
			}
			// Discard other pkg except pkg/tool.
			if !strings.HasPrefix(name, "pkg/tool/") {

object ResolveArtifactNodeCodec : Codec<DefaultResolvableArtifact.ResolveAction> {
    override suspend fun WriteContext.encode(value: DefaultResolvableArtifact.ResolveAction) {
        // TODO - should just discard this action. The artifact location will already have been resolved during writing to the cache
        // and so this node does not do anything useful
        write(value.artifact)
    }

    override suspend fun WriteContext.encode(value: WorkNodeAction) {
        logNotImplemented(value.javaClass)
    }

    override suspend fun ReadContext.decode(): WorkNodeAction {
        // TODO - should discard from graph instead
        return object : WorkNodeAction {
            override fun run(context: NodeExecutionContext) {
                // Ignore
            }
        }
    }

            value.isMissing -> {
                // Can serialize a fixed value and discard the provider
                // TODO - should preserve information about the source, for diagnostics at execution time
                writeByte(1)
            }

            value.hasFixedValue() && sideEffect == null -> {
                // Can serialize a fixed value and discard the provider

	}
}

func TestCloseOnWriter(t *testing.T) {
	writer := WriteOnClose(io.Discard)
	if writer.HasWritten() {
		t.Error("WriteOnCloser must not be marked as HasWritten")
	}
	writer.Write(nil)
	if !writer.HasWritten() {
		t.Error("WriteOnCloser must be marked as HasWritten")
	}

	writer = WriteOnClose(io.Discard)
	writer.Close()
	if !writer.HasWritten() {
		t.Error("WriteOnCloser must be marked as HasWritten")

    }

    @Override
    public MutationValidator getValidator() {
        return holder;
    }

    @Override
    public void discardAll() {
        holder.discard();
    }

    private static class MetadataHolder implements MutationValidator {
        @Nullable
        private SoftReference<LocalComponentGraphResolveState> reference;
        @Nullable