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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_instance(self, payload):
 """ Build an instance of CallInstance :param dict payload: Payload response from the API :returns: twilio.rest.api.v2010.account.call.CallInstance :rtype: twilio.rest.api.v2010.account.call.CallInstance """

        return CallInstance(self._version, payload, account_sid=self._solution['account_sid'], )