wp-includes/class-wp-theme-json.php:5102Returns the raw data.
array public function get_raw_data() { return $this->theme_json; }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/class-wp-theme-json.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.