{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
                        let hir::ForeignItemKind::Fn(sig, ..) = item.kind else { bug!() };
                        let item = tcx.hir_foreign_item(item);
                        require_c_abi_if_c_variadic(tcx, sig.decl, abi, item.span);