def phone_numbers(self):
        """
        Access the phone_numbers

        :returns: twilio.rest.proxy.v1.service.phone_number.PhoneNumberList
        :rtype: twilio.rest.proxy.v1.service.phone_number.PhoneNumberList
        """
        if self._phone_numbers is None:
            self._phone_numbers = PhoneNumberList(self._version, service_sid=self._solution['sid'], )
        return self._phone_numbers
def phone_numbers ( self ) : if self . _phone_numbers is None : self . _phone_numbers = PhoneNumberList ( self . _version , service_sid = self . _solution [ 'sid' ] , ) return self . _phone_numbers
Access the phone_numbers

        :returns: twilio.rest.proxy.v1.service.phone_number.PhoneNumberList
        :rtype: twilio.rest.proxy.v1.service.phone_number.PhoneNumberList