code: def get_content_unscoped_package(self, feed_id, package_name, package_version, **kwargs):
          
          route_values = {}
          if feed_id is not None:
              route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
          if package_name is not None:
              route_values['packageName'] = self._serialize.url('package_name', package_name, 'str')
          if package_version is not None:
              route_values['packageVersion'] = self._serialize.url('package_version', package_version, 'str')
          response = self._send(http_method='GET',
                                location_id='75caa482-cb1e-47cd-9f2c-c048a4b7a43e',
                                version='5.0-preview.1',
                                route_values=route_values,
                                accept_media_type='application/octet-stream')
          if "callback" in kwargs:
              callback = kwargs["callback"]
          else:
              callback = None
          return self._client.stream_download(response, callback=callback)
docs: GetContentUnscopedPackage.
          [Preview API] Get an unscoped npm package.
          :param str feed_id: Name or ID of the feed.
          :param str package_name: Name of the package.
          :param str package_version: Version of the package.
          :rtype: object