requireManager(manager) {
    var viewManager; // If manager is a string, try to load from imported managers

    if (typeof manager === "string" && manager === "default") {
      viewManager = managers_default["a" /* default */];
    } else if (typeof manager === "string" && manager === "continuous") {
      viewManager = continuous["a" /* default */];
    } else {
      // otherwise, assume we were passed a class function
      viewManager = manager;
    }

    return viewManager;
  }
Require the manager from passed string, or as a class function
@param  {string|object} manager [description]
@return {method}