dart-lang/spark — pull request #904 by umop (2014-01-29 09:31:13+00:00)
Title: Analysis start with simple ping command.

Implemented a unified handler for isolate and app-side `Services` class. Defined an abstract `Command` class (better name welcomed) and sample `TestMessage` class extending `Command` with simple ping functionality. `Command` classes act as data-store on one end and simple functionality on the other (response) end.

Review @devoncarew