Shorten output for Set, Map, WeakSet, WeakMap where circular entries

[overlookmotel]

Input:

const map = new Map();
map.set(map, 1);
map.set(2, map);
export default map;

Output is currently the same as input. It could be shortened to:

const map = new Map();
map.set(map, 1).set(2, map);
export default map;

Same thing for Sets, WeakMaps and WeakSets.