如何通过node.js调用mongodb集合getall？

const MongoClient = require('mongodb').MongoClient;
const assert = require('assert');

const url = 'mongodb://localhost:27017'; // MongoDB连接URL
const dbName = 'your_database_name'; // 数据库名称
const collectionName = 'your_collection_name'; // 集合名称

MongoClient.connect(url, function(err, client) {
  assert.equal(null, err);
  console.log('Connected successfully to server');

  const db = client.db(dbName);
  const collection = db.collection(collectionName);

  // 在这里调用getAll方法
});

collection.find({}).toArray(function(err, docs) {
  assert.equal(err, null);
  console.log('Found the following records');
  console.log(docs);

  client.close();
});