wp-admin/includes/ajax-actions.php:2488Handles updating a widget via AJAX.
function wp_ajax_update_widget() { global $wp_customize; $wp_customize->widgets->wp_ajax_update_widget();}Introduced in 3.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/ajax-actions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.