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G’day. I have a stack that outputs an array of subnet IDs:
```export const privateSubnetIds = vpc.privateSubnetIds;```
I have another stack that reads the first stack’s outputs:
```const privateSubnetIds = vpcStack.requireOutput("privateSubnetIds");```
The `requireOutput` <https://github.com/pulumi/pulumi/blob/a952140b34c667d005116ee53be08077b5863948/sdk/nodejs/stackReference.ts#L83|function> returns an `Output&lt;any&gt;` type.

What’s the proper way to cast this back to something like a `string[]`?

I searched Slack and <https://pulumi-community.slack.com/archives/C01PF3E1B8V/p1625151287305100|found> someone else who asked a similar question, but it remained unanswered.

Any thoughts?

FWIW, I have this as a workaround:
```const privateSubnetIds = vpcStack.requireOutput("privateSubnetIds") as unknown as string[];```
but that seems kind of hacky..

iirc doesn't requireOutput accept a generic argument i.e. `const privateSubnetIds = vpcStack.requireOutput&lt;string[]&gt;("privateSubnetIds")`

(Sorry haven't got a pulumi project in front of me atm)

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Hi <@U027FK1J952>, thanks for your suggestion. I attempted that, but my IDE is producing a warning. And it still thinks it’s an `any` type when referenced later.