TraceableEventDispatcher using service decorator

services.yml

services:
    event_dispatcher:
        class: Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher
        arguments:
            - @container

    traceable_event_dispatcher:
        public: false
        class: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher
        decorates: event_dispatcher
        arguments:
            - @traceable_event_dispatcher.inner
            - @debug.stopwatch
            - @logger