function nativeKeysIn(object) {
  var result = [];
  if (object != null) {
    for (var key in Object(object)) {
      result.push(key);
    }
  }
  return result;
}
This function is like
[`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
except that it includes inherited enumerable properties.

@private
@param {Object} object The object to query.
@returns {Array} Returns the array of property names.