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Hi, I have a question regarding Kotlin Koans: Collections: Max min - I'm trying this solution:
`fun Customer.getMostExpensiveOrderedProduct(): Product? = orderedProducts.maxBy { it.price }`
but it's failing and I'm not sure why. The test error is `Expected: null
Actual: null`, so that's not really helpful to find out the problem

OK, so this might be related to the online editor @ <https://try.kotlinlang.org>
The Customer.orderedProducts property is from the previous Koan, and although the code compiles, I'm guessing something is not entirely right there. When copying the same property to the current Koan, the test passes fine.