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number.printwas contrived to match the (seemingly equally contrived) notation used in the UML-2.5.1 spec Figure 14.7, it is NOT a recommended Activity name!
This Activity is called as the exit Behavior of the State
Dialing. It will be invoked both on firing of the self-Transition used to append new digits and on firing of the final "exit" Transition when the accumulated digits are judged to be valid.
If you've been following this tutorial you'll already know the sequence of InitialNode, ReadSelfAction, and ReadStructuralFeatureAction to get at
number:Number - noting that the context class here is
Dialer. Then a CallOperationAction is used to execute the operation
print(), which just uses as method an OpaqueBehavior
printNumber that uses BeanShell as the action language:
Note how it "magically" has access to
n:int[0..*] within class