def refresh
      response = Hubspot::Connection.post_json(REFRESH_PATH, params: { list_id: @id, no_parse: true }, body: {})
      response.code == 204
    end
def refresh
      response = Hubspot::Connection.post_json(REFRESH_PATH, params: { list_id: @id, no_parse: true }, body: {})
      response.code == 204
    end
{http://developers.hubspot.com/docs/methods/lists/refresh_list}