def _build_poll_environ(token):
  return _build_environ('/_ah/channel/dev',
                        {'command': 'poll', 'channel': token})
Get metadata by adapter and os.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/devappserver2/channel_test.py/_build_poll_environ--crossover with--dataset/ETHPy150Open openstack/compass-core/compass/db/api/metadata_holder.py/get_package_os_metadata