docs: function list(appName, callback) {
      if (!appName) {
        return callback(ArgumentError('appName'));
      }
  
      var uri = format('/%s/apps/%s/config/', deis.version, appName);
      commons.get(uri, function onListResponse(err, result) {
        console.log(result);
        callback(err, result ? extractLimits(result) : null);
      });
    }