Function flattenRouteTree

packages/router/src/operators/resolve_data.ts:74–77

* Returns the `ActivatedRouteSnapshot` tree as an array, using DFS to traverse the route tree.

(route: ActivatedRouteSnapshot)

 *  Returns the `ActivatedRouteSnapshot` tree as an array, using DFS to traverse the route tree.
 */
function flattenRouteTree(route: ActivatedRouteSnapshot): ActivatedRouteSnapshot[] {
  const descendants = route.children.map((child) => flattenRouteTree(child)).flat();
  return [route, ...descendants];
}

function runResolve(
  futureARS: ActivatedRouteSnapshot,