code: def get_package_changes(self, feed_id, continuation_token=None, batch_size=None):
          
          route_values = {}
          if feed_id is not None:
              route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
          query_parameters = {}
          if continuation_token is not None:
              query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'long')
          if batch_size is not None:
              query_parameters['batchSize'] = self._serialize.query('batch_size', batch_size, 'int')
          response = self._send(http_method='GET',
                                location_id='323a0631-d083-4005-85ae-035114dfb681',
                                version='5.0-preview.1',
                                route_values=route_values,
                                query_parameters=query_parameters)
          return self._deserialize('PackageChangesResponse', response)
docs: GetPackageChanges.
          [Preview API] Get a batch of package changes made to a feed.  The changes returned are 'most recent change' so if an Add is followed by an Update before you begin enumerating, you'll only see one change in the batch.  While consuming batches using the continuation token, you may see changes to the same package version multiple times if they are happening as you enumerate.
          :param str feed_id: Name or Id of the feed.
          :param long continuation_token: A continuation token which acts as a bookmark to a previously retrieved change. This token allows the user to continue retrieving changes in batches, picking up where the previous batch left off. If specified, all the changes that occur strictly after the token will be returned. If not specified or 0, iteration will start with the first change.
          :param int batch_size: Number of package changes to fetch. The default value is 1000. The maximum value is 2000.
          :rtype: :class:`<PackageChangesResponse> <azure.devops.v5_0.feed.models.PackageChangesResponse>`