wp-includes/class-wp-customize-manager.php:4702Sets URL to link the user to when closing the Customizer.
$return_urlstring public function set_return_url( $return_url ) { $return_url = sanitize_url( $return_url ); $return_url = remove_query_arg( wp_removable_query_args(), $return_url ); $return_url = wp_validate_redirect( $return_url ); $this->return_url = $return_url; }Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-manager.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.