scratch-desktop/scripts/lib/libraries.js

const backdrops = require('@scratch/scratch-gui/backdrops');
const costumes = require('@scratch/scratch-gui/costumes');
const sounds = require('@scratch/scratch-gui/sounds');
const sprites = require('@scratch/scratch-gui/sprites');

const libraries = {
    backdrops,
    costumes,
    sounds,
    sprites
};

module.exports = libraries;