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<https://www.pulumi.com/docs/guides/crosswalk/aws/vpc/#configuring-security-groups-for-a-vpc>

this Crosswalk example is broken, and it appears that the `vpc.get...` functions aren't able to be used to reference the subnets/routetables/etc. because they don't get resolved, but also lack `apply()` to force a resolve

```error TS2339: Property 'apply' does not exist on type 'Promise&lt;Output&lt;string&gt;[]&gt;'.```
when trying to get the `subnetId` for the Instance `webserver-www`

Ah... <https://github.com/pulumi/pulumi-awsx/issues/491>

When you remember that `awsx` is separate from `aws` in the issues it's easier to find.

If you want to call `apply()` on a `Promise` you can wrap it in `pulumi.output(yourPromiseGoesHere)`.

Pulumi knows to call await or then or whatever it is that it needs to call..