{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"if"}]}
        if !args.is_empty() {
    fn write_args(&self, node_id: HirId, args: GenericArgsRef<'tcx>) {
            debug!("write_args({:?}, {:?}) in fcx {}", node_id, args, self.tag());