{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"//"}]}
                // to be needed. If calling something like `<(A, &B)>::default()`, then `pred` is
                // We will look at both the current predicate and the root predicate that caused it
                // `&B: Default` and `root` is `(A, &B): Default`, which is the one we are checking