{"ast_node_type":"other","tokens":[{"end":7,"kind":"keyword","start":0,"text":"});"}]}
    });
        ty::ExistentialPredicate::Trait(ty::ExistentialTraitRef::erase_self_ty(tcx, trait_ref))
    let mut assoc_preds: Vec<_> = traits::supertraits(tcx, poly_trait_ref)