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lastIndexOf

open fun lastIndexOf(element: E): Int

Overrides AbstractMutableList.lastIndexOf

Platform and version requirements: JS

Returns the index of the last occurrence of the specified element in the list, or -1 if the specified element is not contained in the list.

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-array-list/-array-list/last-index-of.html