{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"ty::ExistentialPredicate::AutoTrait(def_id)"}]}
                        ty::ExistentialPredicate::AutoTrait(def_id) => {
                        ty::ExistentialPredicate::Projection(proj) => proj.trait_ref(tcx),
                            ty::ExistentialTraitRef::new(tcx, def_id, ty::GenericArgs::empty())