wp-includes/rest-api/endpoints/class-wp-rest-controller.php:310Retrieves the item's schema, conforming to JSON Schema.
array public function get_item_schema() { return $this->add_additional_fields_schema( array() ); }Introduced in 4.7.0. 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-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.