This code exists in Hooks.php:
// add custom or wikidata banner properties to page_props table if a valid banner exists
// in, checking for custom banner first, then wikidata banner
if ( $bannerTitle !== null ) {
$parser->getOutput()->setExtensionData( 'wpb-banner-options', $paramsForBannerTemplate );
$parser->fetchFileAndTitle( $bannerTitle );
$parser->getOutput()->setUnsortedPageProperty( 'wpb_banner', $bannerTitle->getText() );
$parser->getOutput()->setUnsortedPageProperty( 'wpb_banner_focus_x',
$paramsForBannerTemplate['data-pos-x'] ?? '' );
$parser->getOutput()->setUnsortedPageProperty( 'wpb_banner_focus_y',
$paramsForBannerTemplate['data-pos-y'] ?? '' );
}
}But these properties don't seem to be used anywhere:
Including unused in client-side gadgets as far as I can tell:
This is likely dead code that can be removed.