{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
        let if_kind = hir::ExprKind::If(lowered_cond, self.arena.alloc(then), Some(else_expr));
        let else_expr = self.arena.alloc(self.expr_block(else_blk));
        let if_expr = self.expr(span, if_kind);