Method updateParentContextNode_

src/core/context/values.js:626–642

* Update the node from which the parent value is used. * * @param {IContextPropUsed<?, ?>} used * @param {?ContextNode} newParentContextNode * @private

(used, newParentContextNode)

   * @private
   */
  updateParentContextNode_(used, newParentContextNode) {
    const {parentContextNode: oldParentContextNode, pingParent, prop} = used;
    if (newParentContextNode != oldParentContextNode) {
      used.parentContextNode = newParentContextNode;
      used.parentValue = undefined;

      devAssert(pingParent);
      if (oldParentContextNode) {
        oldParentContextNode.values.unsubscribe(prop, pingParent);
      }

      if (newParentContextNode) {
        devAssert(pingParent);
        newParentContextNode.values.subscribe(prop, pingParent);
      }
    }
  }
}

/**