MediaWikiExtensionMessageGroup.php

<?php
declare( strict_types = 1 );
 
use MediaWiki\Context\IContextSource;
 
class MediaWikiExtensionMessageGroup extends FileBasedMessageGroup {
    public function getDescription( ?IContextSource $context = null ) {
        $language = $context?->getLanguage()->getCode() ?? $this->getSourceLanguage();
 
        $msgkey = $this->conf['BASIC']['descriptionmsg'] ?? null;
        $desc = '';
        if ( $msgkey !== null ) {
            $desc = $this->getMessage( $msgkey, $language );
            if ( $desc === null || $desc === '' ) {
                $desc = $this->getMessage( $msgkey, $this->getSourceLanguage() );
            }
        }
 
        if ( $desc === null || $desc === '' ) {
            // That failed, default to 'description'
            $desc = parent::getDescription( $context );
        }
 
        return $desc;
    }
}