eventBusSingleton.js
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eventBusSingleton.js
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	/**
	* T156186: Please make judicious use of this singleton whose purpose is to
	* allow disparate components the ability to subscribe to a set of events and
	* react to those events.
	*
	* Prefer to use a more localized event bus when possible.
	*
	* Only import this in files at the edges. For example:
	*
	* Good: initialization scripts responsible for initializing classes such as
	* mobile.init/init.js
	* Bad: ImageOverlay.js or in any other component.
	*
	* By doing this, and using dependency injection of the event bus in the
	* components themselves, it will make it easier to switch this event bus out
	* for something more localized later on in our refactoring efforts.
	*/
	module.exports = new OO.EventEmitter();

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