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// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import "package:expect/expect.dart";
class C {
int? y;
D? f() => new D();
C? h() => this;
}
class D {
D g() => this;
bool? operator [](String s) => true;
}
void test(C x) {
x
..f()!.g()['Hi!']!
..h()!.y = 2;
}
main() {
test(new C());
}