Cannot update `ackDeadline` via `setOptions()`

Environment details

• OS: Distroless
• Node.js version: v12
• npm version: N/A
• @google-cloud/pubsub version: 2.6.0

Steps to reproduce

1. Create a subscription by calling:

const subscription = topic.subscription('example-name', {
    ackDeadline: 300,
});

if (!(await subscription.exists())[0]) {
    await subscription.create({
        ackDeadlineSeconds: 300,
    });
}

1. Later, attempt to update the ackDeadline by calling:

const subscription = topic.subscription('example-name', {
    ackDeadline: 60,
});

subscription.setOptions({
    ackDeadline: 60,
});

1. See that in the Google Cloud Platform console, the deadline does not change:

Other notes

The .setMetadata() call works just fine, at least with retryPolicy values.

[laljikanjareeya]

I was trying to explain that if you have created two instance and you are setting ackDeadline using setOption to one of them subscription will not affect to second one.

 const subscription1 = topic.subscription('example-name')
 const subscription2 = topic.subscription('example-name')

subscription1.setOptions({
    ackDeadline: 60,
});

In above example subscription2 will use the ackDeadline that has been set on console.

[feywind]

@kamalaboulhosn I’m probably explaining this poorly 😄 Feel free to throw in any clarification for that comment.