public function create($user, $repo, $title, $base, $head, $body = '')
	{
		// Build the request path.
		$path = '/repos/' . $user . '/' . $repo . '/pulls';

		// Build the request data.
		$data = json_encode(
			array(
				'title' => $title,
				'base'  => $base,
				'head'  => $head,
				'body'  => $body,
			)
		);

		// Send the request.
		return $this->processResponse($this->client->post($this->fetchUrl($path), $data), 201);
	}