WireMock

One more thing from me: is there a way to concatenate a string like in java?
```"value": "{{jsonPath request.body '$.values.list_of_values[0].prefix' + '$.values.list_of_values[0].value'}}"```


I don't think you can use `jsonPath` in that way.  I guess a simple solution would be:
```"value": "{{jsonPath request.body '$.values.list_of_values[0].prefix'}}{{jsonPath request.body '$.values.list_of_values[0].value'}}"```

There is a `join` helper but I would imagine it would make the whole thing more complex - <https://github.com/jknack/handlebars.java/blob/master/handlebars/src/main/java/com/github/jknack/handlebars/helper/StringHelpers.java#L144>

God save Lee and everyone who helps in that chat:heart: