public function getList($owner, $repo, $issueId, $page = 0, $limit = 0, \DateTime $since = null)
	{
		// Build the request path.
		$path = '/repos/' . $owner . '/' . $repo . '/issues/' . (int) $issueId . '/comments';

		$uri = new Uri($this->fetchUrl($path, $page, $limit));

		if ($since)
		{
			$uri->setVar('since', $since->format(\DateTime::RFC3339));
		}

		// Send the request.
		return $this->processResponse($this->client->get($uri));
	}