lastIndexOf

fun lastIndexOf(other: ByteString, fromIndex: Int = DEFAULT__ByteString_size): Int
fun lastIndexOf(other: ByteArray, fromIndex: Int = DEFAULT__ByteString_size): Int
fun lastIndexOf(other: ByteString, fromIndex: Int = DEFAULT__ByteString_size): Int
open fun lastIndexOf(other: ByteArray, fromIndex: Int = DEFAULT__ByteString_size): Int