{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"query"}]}
    query fn_abi_of_instance(
    /// to an `InstanceKind::Virtual` instance (of `<dyn Trait as Trait>::fn`).
        key: ty::PseudoCanonicalInput<'tcx, (ty::Instance<'tcx>, &'tcx ty::List<Ty<'tcx>>)>