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are you looking specifically for how to do it, or how awsx does it?

code is here:
<https://github.com/pulumi/pulumi-awsx/blob/637a01d0d15d80fc5c33dbf83f5f6f6fa379e29e/nodejs/awsx/ec2/natGateway.ts#L50-L53>

thanks i was looking how it did it, i was only cofusing on the vpc file and didnt get that it was on an external file