// an interface.
func dataWord(conv *ir.ConvExpr, init *ir.Nodes) ir.Node {
	pos, n := conv.Pos(), conv.X
	fromType := n.Type()

	// If it's a pointer, it is its own representation.
	if types.IsDirectIface(fromType) {
		return n
	}

	isInteger := fromType.IsInteger()
	isBool := fromType.IsBoolean()
	if sc := fromType.SoleComponent(); sc != nil {
		isInteger = sc.IsInteger()
		isBool = sc.IsBoolean()
	}

        NotationParser<Object, MavenArtifact> sourceNotationParser = NotationParserBuilder
            .toType(MavenArtifact.class)
            .fromType(Provider.class, Cast.uncheckedCast(providerNotationConverter))
            .fromType(AbstractArchiveTask.class, archiveTaskNotationConverter)
            .fromType(PublishArtifact.class, publishArtifactNotationConverter)
            .converter(fileNotationConverter)
            .toComposite();

            .fromCharSequence(stringNotationConverter)
            .fromType(MinimalExternalModuleDependency.class, minimalExternalDependencyNotationConverter)
            .converter(mapNotationConverter)
            .fromType(FileCollection.class, filesNotationConverter)
            .fromType(Project.class, projectNotationConverter)
            .fromType(DependencyFactoryInternal.ClassPathNotation.class, dependencyClassPathNotationConverter)

	cases := []struct {
		desc        string
		fromType    vertexType
		toType      vertexType
		toNamespace string
		toName      string
		start       *Graph
		expect      *Graph
	}{
		{
			// single edge from a configmap to a node, will delete edge and orphaned configmap
			desc:        "edges and source orphans are deleted, destination orphans are preserved",
			fromType:    configMapVertexType,
			toType:      nodeVertexType,

            .toType(DependencyConstraint.class)
            .fromType(MinimalExternalModuleDependency.class, minimalExternalDependencyNotationConverter)
            .fromCharSequence(stringNotationConverter)
            .converter(new DependencyMapNotationConverter<>(instantiator, DefaultDependencyConstraint.class))
            .fromType(Project.class, new DependencyConstraintProjectNotationConverter(instantiator, dependencyFactory))

        NotationParser<Object, IvyArtifact> sourceNotationParser = NotationParserBuilder
                .toType(IvyArtifact.class)
                .fromType(Provider.class, Cast.uncheckedCast(providerNotationConverter))
                .converter(archiveTaskNotationConverter)
                .converter(publishArtifactNotationConverter)
                .converter(fileNotationConverter)

        GRADLE_API      | "Gradle API"
        GRADLE_TEST_KIT | "Gradle TestKit"
        LOCAL_GROOVY    | "Local Groovy"
    }

    def parse(def value) {
        return NotationParserBuilder.toType(Dependency).fromType(DependencyFactoryInternal.ClassPathNotation, factory).toComposite().parseNotation(value)
    }

            .toType(ComponentSelector.class)
            .fromCharSequence(new StringConverter())
            .converter(new MapConverter())
            .fromType(Project.class, new ProjectConverter());

    public static NotationParser<Object, Set<ComponentSelector>> multiParser() {
        return builder().toFlatteningComposite();
    }

// will delete each orphaned "from" vertex, but will never delete the "to" vertex
func (g *Graph) deleteEdges_locked(fromType, toType vertexType, toNamespace, toName string) {
	// get the "to" side
	toVert, exists := g.getVertex_rlocked(toType, toNamespace, toName)
	if !exists {
		return
	}

	// delete all edges between vertices of fromType and toVert
	neighborsToRemove := []*namedVertex{}
	edgesToRemove := []graph.Edge{}

  static constexpr char kId[] = "CPU";

  double GetHardwareSwitchingCost(const TargetHardware* from,
                                  size_t buffer_size) const override {
    auto from_type = from->GetTypeId();
    auto to_type = GetTypeId();
    if (from_type == to_type) return 0.0f;

    // TODO(renjieliu): Implement a better version for different hardware cases.
    return buffer_size * kCrossHardwareTransferPerByteCost / 8.0 +