Function inorder

packages/react-stately/src/data/useTreeData.ts:521–526

(child)

  }

  function inorder(child) {
    // in-order so we add items as we encounter them in the tree, then we can insert them in expected order later
    if (keyArray.includes(child.key)) {
      inOrderKeys.set(child.key, i++);
    }
  }

  function postorder(child) {
    // remove items and update the tree from the leaves and work upwards toward the root, this way