@property<EOL><INDENT>def _proxy(self):<DEDENT>
if self._context is None:<EOL><INDENT>self._context = NotificationContext(<EOL>self._version,<EOL>account_sid=self._solution['<STR_LIT>'],<EOL>call_sid=self._solution['<STR_LIT>'],<EOL>sid=self._solution['<STR_LIT>'],<EOL>)<EOL><DEDENT>return self._context<EOL>
Generate an instance context for the instance, the context is capable of
performing various actions.  All instance actions are proxied to the context

:returns: NotificationContext for this NotificationInstance
:rtype: twilio.rest.api.v2010.account.call.notification.NotificationContext