context: 	function(/* object */ keywordParameters){		// ItemFileWriteStore extends ItemFileReadStore to implement these additional dojo.data APIs		this._features['dojo.data.api.Write'] = true;		this._features['dojo.data.api.Notification'] = true;				// For keeping track of changes so that we can implement isDirty and revert		this._pending = {			_newItems:{}, 			_modifiedItems:{}, 			_deletedItems:{}		};		if(!this._datatypeMap['Date'].serialize){			this._datatypeMap['Date'].serialize = function(obj){				return dojo.date.stamp.toISOString(obj, {zulu:true});			}		}				// this._saveInProgress is set to true, briefly, from when save() is first called to when it completes		this._saveInProgress = false;	}, {
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