{"ast_node_type":"variable","tokens":[{"end":98,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(block) = self.eat_metavar_seq(MetaVarKind::Block, |this| this.parse_block()) {
    ) -> PResult<'a, (AttrVec, P<Block>)> {
            return Ok((AttrVec::new(), block));