{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"if"}]}
        if !matches!(sig.abi, ExternAbi::C { .. }) {
        let sig = self.tcx.fn_sig(def_id).instantiate_identity().skip_binder();
            self.tcx.dcx().emit_err(UnexportableItem::FnAbi(span));