library;
import self as self;
import "dart:core" as core;
import "dart:isolate" as iso;

static field dynamic subscription = null;
static method onData(dynamic x) → void {
  core::print(x);
  self::subscription.cancel();
}
static method main() → dynamic {
  dynamic string = core::String::fromCharCode(65);
  dynamic port = iso::ReceivePort::•();
  self::subscription = port.listen(self::onData);
  port.sendPort.send(string);
}