{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"for"}]}
    for (pred, _) in tcx.explicit_item_bounds(item_def_id).iter_instantiated_copied(tcx, id_args) {
    let id_args = ty::GenericArgs::identity_for_item(tcx, item_def_id);
        debug!(?pred);