fun Char.isHighSurrogate(): Boolean
Returns true if this character is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).
© 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/is-high-surrogate.html