/**
	 * Return the search engines we support. If only $wgSearchType
	 * is set, it'll be an array of just that one item.
	 *
	 * @return array
	 */
	public function getSearchTypes() {
		$alternatives = $this->config->get( 'SearchTypeAlternatives' ) ?: [];
		array_unshift( $alternatives, $this->config->get( 'SearchType' ) );

		return $alternatives;
	}

	/**
	 * Return the search engine configured in $wgSearchType, etc.
	 *
	 * @return string|null
	 */
	public function getSearchType() {
		return $this->config->get( 'SearchType' );
	}

		$searchConfig = MediaWikiServices::getInstance()->getSearchEngineConfig();
		$alternatives = $searchConfig->getSearchTypes();
		if ( count( $alternatives ) > 1 ) {
			if ( $alternatives[0] === null ) {
				$alternatives[0] = self::$BACKEND_NULL_PARAM;
			}
			$params['backend'] = [
				ApiBase::PARAM_DFLT => $searchConfig->getSearchType(),
				ApiBase::PARAM_TYPE => $alternatives,
			];
			// @todo: support profile selection when multiple
			// backends are available. The solution could be to
			// merge all possible profiles and let ApiBase
			// subclasses do the check. Making ApiHelp and ApiSandbox
			// comprehensive might be more difficult.
		} else {
			$params += $this->buildProfileApiParam();
		}