@ExperimentalUnsignedTypes fun String.toULongOrNull(): ULong?
Parses the string as an ULong number and returns the result or null
if the string is not a valid representation of a number.
@ExperimentalUnsignedTypes fun String.toULongOrNull( radix: Int ): ULong?
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-u-long-or-null.html