wp-includes/widgets/class-wp-widget-media.php:476Returns the default description of the widget.
string protected static function get_default_description() { if ( self::$default_description ) { return self::$default_description; } self::$default_description = __( 'A media item.' ); return self::$default_description; }Introduced in 6.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/widgets/class-wp-widget-media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.