is Model.save() returns anything in mongose code example

Example: mongoose save a document

const Person = mongoose.model('Person', Schema({
  name: String,
  rank: String
}));

const doc = new Person({
  name: 'Will Riker',
  rank: 'Commander'
});
// Inserts a new document with `name = 'Will Riker'` and
// `rank = 'Commander'`
await doc.save();

const person = await Person.findOne();
person.name; // 'Will Riker'