{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"assert!(labeled_block.target_id.is_ok());"}]}
                            assert!(labeled_block.target_id.is_ok()); // see `is_loop_match`.
                            // can't have two labels, so the hir_id is a unique identifier.
                            break_destination.target_id == labeled_block.target_id