wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php:292Retrieves the registered sidebar with the given id.
$idstring|intarray|null protected function get_sidebar( $id ) { return wp_get_sidebar( $id ); }Introduced in 5.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.