function getProp(object, keys, defaultVal = null) {
  keys = Array.isArray(keys) ? keys : keys.replace(/(\[(\d)\])/g, '.$2').split('.');
  object = object[keys[0]];
  if (object && keys.length > 1) {
    return this.__get(object, keys.slice(1), defaultVal);
  }
  return object === undefined ? defaultVal : object;
}