# sortKeys()
The sortKeys method sorts the collection by the keys of the underlying associative array:
const collection = collect({
id: 10,
first: 'Darwin',
last: 'Núñez',
});
const sorted = collection.sortKeys();
sorted.all();
// {
// first: 'Darwin',
// id: 10,
// last: 'Núñez',
// }