isHighSurrogate
Platform and version requirements: JVM (1.0), JS (1.1), Native (1.3)
fun Char.isHighSurrogate(): Boolean
Returns true if this character is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-high-surrogate.html
