node.js / promises / Error message: ...is not a function

I am trying to run a simple 2 file node.js project. Project is running a problem and prints an error message "TypeError: steamBroccoli is not a function". I removed the braces from steamBroccoli() - It worked, The project ran without errors. But I don't know how it ran like that and I don't know why it pointed that problem as steamBroccoli is a function.

library.js

let cookBeans = () => { return new Promise ((resolve, reject) => { setTimeout(()=>{ resolve('beans') }, 1000) }) } let steamBroccoli = () => { return new Promise ((resolve, reject) => { setTimeout(()=>{ resolve('broccoli') }, 1000) }) } let cookRice = () => { return new Promise ((resolve, reject) => { setTimeout(()=>{ resolve('rice') }, 1000) }) } let bakeChicken = () => { return new Promise ((resolve, reject) => { setTimeout(()=>{ resolve('chicken') }, 1000) }) } module.exports = {cookBeans, steamBroccoli, cookRice, bakeChicken} 

let {cookBeans, steamBroccoli, cookRice, bakeChicken} = require('./library.js') async function serveDinner(){ const vegetablePromise = steamBroccoli(); // If I remove the braces - The error disappear and the code works. const starchPromise = cookRice(); const proteinPromise = bakeChicken(); const sidePromise = cookBeans(); console.log(`Dinner is served. We're having ${await vegetablePromise}, ${await starchPromise}, ${await proteinPromise}, and ${await sidePromise}.`) } serveDinner();