private function getAllDiscoverySoapActions() {
        /* If it is not cached, update the cache */
        if ( $this->discoverySoapActions == null ) {
            $this->discoverySoapActions = self::getAllSoapActions( $this->client->getDiscoveryDOM(), 'DiscoveryService' );
            $this->setCachedSoapActions( 'discovery', $this->discoverySoapActions );
        }

        /* Return the cached value */

        return $this->discoverySoapActions;
    }