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    public static void classicalSample() {
        Observable.create(new ObservableOnSubscribe() {

            @Override
            public void subscribe(ObservableEmitter observableEmitter) throws Exception {
                observableEmitter.onNext("1");
                observableEmitter.onNext("2");
                observableEmitter.onNext("3");
                observableEmitter.onNext("4");

            }
        }).subscribe(new Observer() {

            private Disposable mDisposable;

            @Override
            public void onSubscribe(Disposable disposable) {
                Log.d(TAG, "onSubscribe");
                mDisposable = disposable;
            }

            @Override
            public void onNext(String s) {
                Log.d(TAG, "onNext=" + s);
                if ("2".equals(s)) {
                    mDisposable.dispose();
                }
            }

            @Override
            public void onError(Throwable throwable) {
                Log.d(TAG, "onError");

            }

            @Override
            public void onComplete() {
                Log.d(TAG, "onComplete");

            }
        });
    }

for (const i of obj) {
  console.log(i)
}

for (const i of obj) {
  console.log(i)
}

foreach ($i as $obj) {
  var_dump($obj);
}