wp-includes/widgets/class-wp-widget-rss.php:24Sets up a new RSS widget instance.
public function __construct() { $widget_ops = array( 'description' => __( 'Entries from any RSS or Atom feed.' ), 'customize_selective_refresh' => true, 'show_instance_in_rest' => true, ); $control_ops = array( 'width' => 400, 'height' => 200, ); parent::__construct( 'rss', __( 'RSS' ), $widget_ops, $control_ops ); }Introduced in 2.8.0. 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-rss.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.