{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"ty::Binder::dummy(ty::PredicateKind::Coerce(ty::CoercePredicate"}]}
                        ty::Binder::dummy(ty::PredicateKind::Coerce(ty::CoercePredicate {
                        self.param_env,
                            a: source_ty,