{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"Some(self.impl_trait_header(def_id)?.trait_ref)"}]}
        Some(self.impl_trait_header(def_id)?.trait_ref)
    ) -> Option<ty::EarlyBinder<'tcx, ty::TraitRef<'tcx>>> {
    }