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Sure thing - you can fo something like `let failover = undefined; if (something) { failover = ...  } new Record(... { failover: failover });` 

how about something like this?
```function Record(type: string, record: string, failoverRoutingPolicies?: RecordFailoverRoutingPolicy[]) { return new aws.route53.Record(record, {
    records: [record],
    ttl: 300,
    type: "A",
    zoneId: aws_route53_zone_primary.zoneId,
});}```
This then can be used like this:
```Record('A', '1.2.3.4');
Record('CNAME', '<http://foo.com|foo.com>');
Record('CNAME', '<http://blabla.com|blabla.com>', {somepolicy});```


obviously my example isn't very useful in itself. but you get the idea: create a function which only accepts as args the 'non-common' things and hardcode the common things inside the function body.

if the failoverpolicy is the same across most entries, you can simply create it as const outside the function via `const policy = {mypolicy}` and then pass it to the function