Model.populate() does not mention the populate option

[IslandRhythms]

I've seen a few scripts now of people using populate as an option in their populate functions. From what I can tell its another way to do a nested/chain populate however the docs don't mention it at all.

[twhy]

@IslandRhythms I find this example in docs about the populate option at document level.
Populating across multiple levels
https://mongoosejs.com/docs/populate.html#deep-populate

User.
  findOne({ name: 'Val' }).
  populate({
    path: 'friends',
    // Get friends of friends - populate the 'friends' array for every friend
    populate: { path: 'friends' }
  });