{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
                // trait matching creating lifetime constraints that are too strict.
                // a type variable, to pass as the `Self` to the trait, avoiding invariant
                // e.g., adding `&'a T` and `&'b T`, given `&'x T: Add<&'x T>`, will result