bradcornford / Setter

	 *

	 * @return void

	 */

	protected function setCacheExpiry($value)

	{

		if (!is_bool($value) && !is_integer($value) && !$value instanceof DateTime) {

			throw new SettingArgumentException('Expiry is required in boolean, integer or DateTime format.');

		}

		$this->cacheExpiry = $value;

	}

	/**

	 * Get the cache tag

	 *

	 * @return self

	 */

	public function cacheExpires($expiry)

	{

		if (!is_bool($expiry) && !is_integer($expiry) && !$expiry instanceof DateTime) {

			throw new SettingArgumentException('Expiry is required in boolean, integer or DateTime format.');

		}

		$this->cacheExpiry = $expiry;

		return $this;

	}

}