{
    "report.generators": {
         "my-report": {
             "generator": "expression",
             "cols": {
                 "subject": null,
                 "mode": null,
                 "hello": "format(\"Hello World: %s\", \"Foobar\")"
             }
         }
    }
}
---
phpbench run --report=my-report --executor=debug NothingBench.php --progress=none
---
+--------------+----------+---------------------+
| subject      | mode     | hello               |
+--------------+----------+---------------------+
| benchNothing | 10.000μs | Hello World: Foobar |
+--------------+----------+---------------------+

