Method setIsRoot

src/core/context/node.js:322–326

* Designates (or undesignates) the node as a root node. If the node is * designated as a root, it will no longer discover itself. * * @param {boolean} isRoot

(isRoot)

   * @param {boolean} isRoot
   */
  setIsRoot(isRoot) {
    this.isRoot = isRoot;
    const newRoot = isRoot ? this : (this.parent?.root ?? null);
    this.updateRoot(newRoot);
  }

  /**
   * @param {?ContextNode<?>} root