Forgets all of its children.

This expression is somehow deprecated in favour of the :forget attribute that any expression understands.

  sequence do
    participant 'alpha'
    forget do
      sequence do
        participant 'bravo'
        participant 'charly'
      end
    end
    participant 'delta'
  end

In this example above, the flow goes from alpha to bravo and delta. The bravo-charly segment is independent of the main process flow. Charly‘s reply will be forgotten.

Now the equivalent process definition, but using the :forget attribute :

  sequence do
    participant 'alpha'
    sequence :forget => true do
      participant 'bravo'
      participant 'charly'
    end
    participant 'delta'
  end

This expression can be useful for fire-and-forget parallelism in processes.