Hello. This throws an error with an invalid search operator. Any ideas as to why?

var jobSearchObj = search.create({
					   type: search.Type.JOB,
					   filters:[
						   ["parent", <http://search.Operator.IS|search.Operator.IS>, parentId],
						   'AND',
						   ["parent",search.Operator.ISNOT, "123"]
						   ]
					});