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```import * as aws from '@pulumi/aws';
            const xx = await aws.ec2.getSubnetIds({
                vpcId: "123",
            });```

ah right, yeh I don't think its expected for them to work in policy programs right now although it would be an interesting extension. Feel free to raise a feature request issue about it. For now yes you'll have to use the aws sdk for those sorts of lookups.