{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"if"}]}
                    if let ty::Bound(debruijn, b) = *result_value.kind() {
                    // e.g., here `result_value` might be `?0` in the example above...
                        // ...in which case we would set `canonical_vars[0]` to `Some(?U)`.