{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
        // * `for<'a> for<'b> Trait1<'a, 'b>: Trait2<'a /* ok */, 'b /* not ok */>`
        // * `(for<'a> Trait1<'a>): Trait2<'a /* not ok */>`
        let (lifetime_defs, _) = self.parse_late_bound_lifetime_defs()?;