constructor(path, msg) {
    msg = msg || 'Cannot populate path `' + path + '` because it is not in your schema. ' + 'Set the `strictPopulate` option to false to override.';
    super(msg);
    this.path = path;
  }
Strict mode error constructor

@param {String} path
@param {String} [msg]
@inherits MongooseError
@api private