diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/class-wp-widget-factory.php
--- a/wp/wp-includes/class-wp-widget-factory.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/class-wp-widget-factory.php	Wed Sep 21 18:19:35 2022 +0200
@@ -102,4 +102,39 @@
 			$this->widgets[ $key ]->_register();
 		}
 	}
+
+	/**
+	 * Returns the registered WP_Widget object for the given widget type.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param string $id_base Widget type ID.
+	 * @return WP_Widget|null
+	 */
+	public function get_widget_object( $id_base ) {
+		$key = $this->get_widget_key( $id_base );
+		if ( '' === $key ) {
+			return null;
+		}
+
+		return $this->widgets[ $key ];
+	}
+
+	/**
+	 * Returns the registered key for the given widget type.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param string $id_base Widget type ID.
+	 * @return string
+	 */
+	public function get_widget_key( $id_base ) {
+		foreach ( $this->widgets as $key => $widget_object ) {
+			if ( $widget_object->id_base === $id_base ) {
+				return $key;
+			}
+		}
+
+		return '';
+	}
 }