{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"expect_fn,"}]}
        expect_fn, (Ident, &FnSig<'hir>, &'hir Generics<'hir>, BodyId),
            ItemKind::Fn { ident, sig, generics, body, .. }, (*ident, sig, generics, *body);