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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_owned_subscriptions(self, server_id):
 """ Return the indication subscriptions in a WBEM server owned by this subscription manager. This function accesses only the local list of owned subscriptions; it does not contact the WBEM server. The local list of owned subscriptions is discovered from the WBEM server when the server is registered with the subscription manager, and is maintained from then on as changes happen through this subscription manager. Parameters: server_id (:term:`string`):
 The server ID of the WBEM server, returned by :meth:`~pywbem.WBEMSubscriptionManager.add_server`. Returns: :class:`py:list` of :class:`~pywbem.CIMInstance`: The indication subscription instances. """


        # Validate server_id
        self._get_server(server_id)

        return list(self._owned_subscriptions[server_id])