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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_item(self, item, **options):
 """ Add a layer or table item to the export. :param Layer|Table item: The Layer or Table to add :rtype: self """

        export_item = {
            "item": item.url,
        }
        export_item.update(options)
        self.items.append(export_item)
        return self