{"ast_node_type":"other","tokens":[{"end":17,"kind":"keyword","start":0,"text":")"}]}
    ) -> ExprId {
        mk_block: impl FnOnce(Option<BlockId>, Box<[Statement]>, Option<ExprId>) -> Expr,
        let block_id = self.expander.ast_id_map().ast_id_for_block(&block).map(|file_local_id| {