return typ

	case *ast.FuncType:
		typ := new(Signature)
		setDefType(def, typ)
		check.funcType(typ, nil, e)
		return typ

	case *ast.InterfaceType:
		typ := check.newInterface()
		setDefType(def, typ)
		check.interfaceType(typ, e, def)
		return typ

	case *ast.MapType:
		typ := new(Map)
		setDefType(def, typ)

		typ.key = check.varType(e.Key)

		check.use(e0)

	case *syntax.FuncType:
		typ := new(Signature)
		setDefType(def, typ)
		check.funcType(typ, nil, nil, e)
		return typ

	case *syntax.InterfaceType:
		typ := check.newInterface()
		setDefType(def, typ)
		check.interfaceType(typ, e, def)
		return typ

	case *syntax.MapType:
		typ := new(Map)
		setDefType(def, typ)

		typ.key = check.varType(e.Key)

func newBasic(kind Kind, obj Object) *Type {
	t := newType(kind)
	t.obj = obj
	return t
}

// NewInterface returns a new interface for the given methods and
// embedded types. Embedded types are specified as fields with no Sym.
func NewInterface(methods []*Field) *Type {
	t := newType(TINTER)
	t.SetInterface(methods)
	for _, f := range methods {

pkg go/types, func NewField(token.Pos, *Package, string, Type, bool) *Var
pkg go/types, func NewFunc(token.Pos, *Package, string, *Signature) *Func
pkg go/types, func NewInterface([]*Func, []*Named) *Interface
pkg go/types, func NewLabel(token.Pos, *Package, string) *Label
pkg go/types, func NewMap(Type, Type) *Map
pkg go/types, func NewMethodSet(Type) *MethodSet

        Map<String, CtClass> newInterfaces = collectImplementedInterfaces(newClass)

        newInterfaces.keySet().removeAll(oldInterfaces.keySet())

        if (newInterfaces.isEmpty()) {
            return null
        }

        List<String> changes = filterChangesToReport(newClass, newInterfaces)
        if (changes.isEmpty()) {
            return null
        }

}

// Larger example from issue

type InterfaceA[T comparable] interface {
	setData(string) InterfaceA[T]
}

type ImplA[T comparable] struct {
	data string
	args []any
}

func NewInterfaceA[T comparable](args ...any) InterfaceA[T] {
	return &ImplA[T]{
		data: fmt.Sprintf("%v", args...),
		args: args,
	}
}

func (k *ImplA[T]) setData(data string) InterfaceA[T] {
	k.data = data
	return k
}

        String newSuperName = fixInternalNameForBackwardCompatibility(superName);
        String[] newInterfaces = fixInternalNamesForBackwardsCompatibility(interfaces);
        super.visit(version, access, name, signature, newSuperName, newInterfaces);
    }

    @Override
    public FieldVisitor visitField(int access, String name, String descriptor, String signature, Object value) {

		{"NewArray", Func, 5},
		{"NewChan", Func, 5},
		{"NewChecker", Func, 5},
		{"NewConst", Func, 5},
		{"NewContext", Func, 18},
		{"NewField", Func, 5},
		{"NewFunc", Func, 5},
		{"NewInterface", Func, 5},
		{"NewInterfaceType", Func, 11},
		{"NewLabel", Func, 5},
		{"NewMap", Func, 5},
		{"NewMethodSet", Func, 5},
		{"NewNamed", Func, 5},
		{"NewPackage", Func, 5},
		{"NewParam", Func, 5},

pkg go/build, const AllowBinary //deprecated
pkg go/doc, type Package struct, Bugs //deprecated
pkg go/importer, func For //deprecated
pkg go/importer, func ForCompiler //deprecated
pkg go/types, func NewInterface //deprecated
pkg go/types, method (*Interface) Embedded //deprecated
pkg image, var ZP //deprecated
pkg image, var ZR //deprecated
pkg image/jpeg, type Reader //deprecated