This is a simple implementation of a Chain Of Responsibility or Chain Of Command design pattern. We already have such a service in TapestryIOC and I thought of implementing the same in Plastic.
In Chain of Command design pattern, we create a single service from a set of commands which implement a common interface. This pattern can be provided out of the box by using Class transformations. The assembled service will run all the commands in the given sequence unless any of the commands throw an exception. I am keeping the example simple by forcing the methods in the command interface to return only void.