 ioRollupSet[ioTarget.getID()] = null; 
delete ioRollupSet[ioTarget.getID()]; 
	doOverallRollup: function (ioTarget, ioRollupSet)	{		// This method implements the loop of RB.1.5.  The other rollup process		// are encapsulated in the RollupRuleset object.		// Attempt to get Rollup Rule information from the activity node		var rollupRules = ioTarget.getRollupRules();				if (rollupRules == null)		{			rollupRules = new SeqRollupRuleset();		}				// Apply the rollup processes to the activity		rollupRules.evaluate(ioTarget);				// Remove this activity from the rollup set		// todo: check this		ioRollupSet[ioTarget.getID()] = null;    	},
6251	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6251/1411d268e590bd7d23033c9d5908b240a6aef0df/ADLSequencer.js/clean/Modules/Scorm2004/scripts/adl2js/ADLSequencer.js