{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(attr) = expr.attrs().iter().find(|a| is_cfg(a)) {
        //     in order for filter_map_expr() to be able to avoid this check
            self.sess.dcx().emit_err(RemoveExprNotSupported { span: attr.span });