text: var children = /*#__PURE__*/new Map();
  var sessionIdIndex = 0;
  var registry = {
    bookId: function () {
      return "x:" + sessionIdIndex++;
    },
    register: function (id, actor) {
      children.set(id, actor);
      return id;
    },
    get: function (id) {
      return children.get(id);
    },
    free: function (id) {
      children.delete(id);
    }
  };
  
  export { registry };
  