How to export store content?

Is there a way to export the store content?

test.v:
```verilog
module test (a, b, c);
    input a, b;
    output c;
    assign c = a | b;
endmodule
```

```
cirkit> read_verilog --xmg test.v 
cirkit [xmg]> show --silent out
(out is an empty file)
cirkit [xmg]> print --xmg
(empty line)
```
