context: 	_assertIsAttribute: function(/* attribute-name-string */ attribute){		//	summary:		//      This function tests whether the item passed in is indeed a valid 'attribute' like type for the store.		//	attribute: 		//		The attribute to test for being contained by the store.		if(typeof attribute !== "string"){ 			throw new Error("dojo.data.JsonItemStore: a function was passed an attribute argument that was not an attribute name string");		}	},
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