{"ast_node_type":"function","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
    let inputs_fn = fn_sig.inputs().iter().copied();
    let inputs_hir = tcx.hir_fn_decl_by_hir_id(fn_id).map(|decl| &decl.inputs);
    for (idx, (param_ty, param)) in inputs_fn.chain(maybe_va_list).zip(body.params).enumerate() {