@mui/x-tree-view/internals/plugins/lazyLoading/types.d.ts

The community edition of the MUI X Tree View components.

import { TreeViewItemId } from "../../../models/index.js";
export interface RichTreeViewLazyLoadedItemsStatus {
  loading: Record<TreeViewItemId, boolean>;
  errors: Record<TreeViewItemId, Error | null>;
}