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'use strict';
const utils = require('../../utils');
const keysToSkip = new Set(['__index', '__parentArray', '_doc']);
/** * Using spread operator on a Mongoose document gives you a * POJO that has a tendency to cause infinite recursion. So * we use this function on `set()` to prevent that. */
module.exports = function handleSpreadDoc(v, includeExtraKeys) {  if (utils.isPOJO(v) && v.$__ != null && v._doc != null) {    if (includeExtraKeys) {      const extraKeys = {};      for (const key of Object.keys(v)) {        if (typeof key === 'symbol') {          continue;        }        if (key[0] === '$') {          continue;        }        if (keysToSkip.has(key)) {          continue;        }        extraKeys[key] = v[key];      }      return { ...v._doc, ...extraKeys };    }    return v._doc;  }
  return v;};