'Generate an instance context for the instance, the context is capable of
performing various actions.  All instance actions are proxied to the context
:returns: MediaContext for this MediaInstance
:rtype: twilio.rest.api.v2010.account.message.media.MediaContext'

@property
def _proxy(self):

    if (self._context is None):
        self._context = MediaContext(self._version, account_sid=self._solution['account_sid'], message_sid=self._solution['message_sid'], sid=self._solution['sid'])
    return self._context
