/**
  * {@inheritdoc}
  */
 public static function fromArray(array $values)
 {
     $message = new self();
     $values = array_merge(['original_timestamp_ms' => null, 'new_timestamp_ms' => null, 'inventory_items' => []], $values);
     $message->setOriginalTimestampMs($values['original_timestamp_ms']);
     $message->setNewTimestampMs($values['new_timestamp_ms']);
     foreach ($values['inventory_items'] as $item) {
         $message->addInventoryItems($item);
     }
     return $message;
 }