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sortByDescending

inline fun <T, R : Comparable<R>> Array<out T>.sortByDescending(
    crossinline selector: (T) -> R?)

Sorts elements in the array in-place descending according to natural sort order of the value returned by specified selector function.

inline fun <T, R : Comparable<R>> MutableList<T>.sortByDescending(
    crossinline selector: (T) -> R?)

Sorts elements in the list in-place descending according to natural sort order of the value returned by specified selector function.

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/sort-by-descending.html