messaging/Event.js
/**
		 * Removes registration for an event handler. That is, the handler will
		 * no longer be called if the event fires.
		 *
		 * @public
		 * @param {Function} handler
		 */
Removes registration for an event handler. That is, the handler will
no longer be called if the event fires.

@public
@param {Function} handler
Removes registration for an event handler . That is the handler will no longer be called if the event fires . @public @param { Function } handler
unregister(handler) {
			assert.argumentIsRequired(handler, 'handler', Function);
			removeRegistration.call(this, handler);
		}
unregister ( handler ) { assert . argumentIsRequired ( handler , 'handler' , Function ) ; removeRegistration . call ( this , handler ) ; }
Removes registration for an event handler.
Removes registration for an event handler .