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I want to reuse a default value expression from one value parameter for another one. Just using `.defaultValue` directly doesn't work in all cases because the new default value needs to be "resolved" (for example, if the expression is a `FirStringConcatenationCall` then its `argumentList` must be a `FirResolvedArgumentList` which the original expression doesn't have)

So is there a way to "copy" or otherwise resolve the expression

I suppose I could transform the expression but there are a lot of them

Don't have an answer for you, but am curious about this. Is that maybe because default values can refer to other (earlier) parameters? e.g. `fun foo(x: Int = 0, y: Int = x + 1, z: Int = y + 1)`

I think it’s because during this phase, they might not all be resolved. <@UE206C71V> had a great idea of just adding a stub and then generating it in the backend instead.