public function createVersion($project_key, $version, array $options = array())
	{
		$options = array_merge(
			array(
				'name' => $version,
				'description' => '',
				'project' => $project_key,
				// 'userReleaseDate' => '',
				// 'releaseDate' => '',
				'released' => false,
				'archived' => false,
			),
			$options
		);

		return $this->api(self::REQUEST_POST, '/rest/api/2/version', $options);
	}