code: function (map) {
              var key;
              for (key in map) {
                  if (map.hasOwnProperty(key)) {
                      this._init(key, map[key]);
                  }
              }
              return this;
          }
docs: Create subviews with a map of configured
  subview keys to additional options.
  @param  {object} map
  @return {SubViewManager}