Convert(chars:Pointer<Char16>, charCount:Int, bytes:Pointer<UInt8>, byteCount:Int, flush:Bool, charsUsed:Out<Int>, bytesUsed:Out<Int>, completed:Out<Bool>):Void
Convert(chars:NativeArray<Char16>, charIndex:Int, charCount:Int, bytes:NativeArray<UInt8>, byteIndex:Int, byteCount:Int, flush:Bool, charsUsed:Out<Int>, bytesUsed:Out<Int>, completed:Out<Bool>):Void
GetByteCount(chars:NativeArray<Char16>, index:Int, count:Int, flush:Bool):Int
GetByteCount(chars:Pointer<Char16>, count:Int, flush:Bool):Int