Caution to pass argument QueryOptions by reference

[ecalcutin]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

6.4.6

Node.js version

17.7.1

MongoDB server version

5x

Description

find method implicitly overrides arguments passed by reference
Bug has been raised originally on nestjs/nest#10045 but once I found the root case, it looks like it is related to mongoose.

Steps to Reproduce

Given object

const queryOptions = {
  populate: ['whatever']
};

const entities = await model.find({}, {}, options).lean();

Once query is execuded, the queryOptions became {}.

Expected Behavior

queryOptions variable should not be overriden or should be properly documented here: https://mongoosejs.com/docs/api.html#query_Query-setOptions