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Component description specifies the event types that the component can consume via consumes keyword
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The container is responsible for providing event service or notification service and encapsulates those events in Any type.
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Event model is based on push model and components do not know the source of the event unless it has been designed by the component developer.
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push_event() method is defined in EventConsumerBase interface.
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A type specific event consumer interfaces are derived from EventConsumerBase interface with push_XX() methods exposing the specified event type.
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consumes keyword produces: get_consumer_XX() and push() operations.
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