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maxOrNull

Platform and version requirements: JVM (1.4), JS (1.4), Native (1.4)
fun CharSequence.maxOrNull(): Char?

Returns the largest character or null if there are no characters.

© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/max-or-null.html