wp-includes/class-wp-recovery-mode.php:139Gets the recovery mode session ID.
string public function get_session_id() { return $this->session_id; }Introduced in 5.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-recovery-mode.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.