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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 get_quotes(self):
 """Retrieve a list of active quotes. :returns: a list of SoftLayer_Billing_Order_Quote """

        mask = "mask[order[id,items[id,package[id,keyName]]]]"
        quotes = self.client['Account'].getActiveQuotes(mask=mask)
        return quotes