public function update($current)
	{
		$this->validate();

		if ($this->files()->isEmpty()) {
			return $this->currentPictures($current);
		}

		$result = $this->mapUpdatedPictures($current);

		if (count($result) == 1 && is_array($result[0])) {
			return $result[0];
		}

		return $result;
	}