public function search($jql, $startAt = null, $maxResults = null, $validateQuery = null, $fields = null, $expand = null)
    {
        $parameters = array(
            'jql' => $jql,
            'startAt' => $startAt,
            'maxResults' => $maxResults,
            'validateQuery' => $validateQuery,
            'fields' => $fields,
            'expand' => $expand
        );
        return $this->apiClient->callEndpoint('search', $parameters);
    }