Function callback

packages/insomnia-data/node-src/database/database.test.ts:35–37

(change: ChangeBufferEvent<BaseModel>[])

    const changesSeen: ChangeBufferEvent<BaseModel>[][] = [];

    const callback = (change: ChangeBufferEvent<BaseModel>[]) => {
      changesSeen.push(change);
    };

    db.onChange(callback);
    const newDoc = await services.request.create(doc);