NoSuchMethodError: connection.send(message)

I followed the How to Run Dart Chat[1] instruction, but it failed.

It says: Uncaught Error: Class '_WebSocketImpl' has no instance method 'send'.

I have fixed this error by modifying method name from 'send' to 'add'.

My env: the latest DartEditor on Mac OS X 10.8.3.

[1]: [Chapter 5. Walkthrough: Dart Chat from Dart: Up and Running | Dart: Structured web apps](http://www.dartlang.org/docs/dart-up-and-running/contents/ch05.html#ch05-how-to-run)