`getChildren()` includes synthetic NodeObjects, that can't easily be discerned from RemoteNodes

export declare class Client  {
    constructor(options?: Record<string, unknown>);
}

import {API} from 'typescript/unstable/sync';
import type {Declaration} from 'typescript/unstable/ast';
const program = new API().createProgram('./index.d.ts', {});
const checker = program.getProject().checker;
const getSymbol = (child: Declaration) => [checker.getSymbolAtLocation(child), child.getChildren().map(getSymbol)];
console.log(getSymbol(program.getSourcefile('./index.d.ts'));

NodeObject {
  kind: 136,
  flags: 0,
  pos: 2216,
  end: 2232,
  parent: [RemoteNode],
  _data: undefined
}