codePointAt
fun codePointAt(utf8: ByteArray, pos: Int, reuse: UnicodeUtil.UTF8CodePoint?): UnicodeUtil.UTF8CodePoint
Computes the codepoint and codepoint length (in bytes) of the specified offset in the provided utf8 byte array, assuming UTF8 encoding. As with other related methods in this class, this assumes valid UTF8 input and does not perform full UTF8 validation. Passing invalid UTF8 or a position that is not a valid header byte position may result in undefined behavior. This makes no attempt to synchronize or validate.