Pact Foundation

Hey there :wave: is there any way to create a `DslPart` from an existing JSON file or object? Or is it only the `PactDslJsonBody` and `newJsonBody` approaches listed <https://docs.pact.io/implementation_guides/jvm/consumer#examples|here>?
We have existing JSON files used by our tests so it’d be nice to not have to rewrite all of them into this format

`DslPart` classes are for building JSON payloads. If you already have JSON files, why not just use them directly?

I’m pretty sure that’s what we do for our other contract tests, but it seems to be different for Message Pact
We’re using a `MessagePactBuilder`, and its `withContent()` method only accepts a `DslPart` or `PactXmlBuilder`
Is there something simple I’m missing that lets us do this?

For example, is it possible to do something like this?
```JSONObject jsonObject = loadJsonFromFile(...);

return new MessagePactBuilder()
            .expectsToReceive("a user created message")
            .withContent(jsonObject)
            .toPact();```

Ok, can you raise a GitHub issue for that?

Raised it here: <https://github.com/pact-foundation/pact-jvm/issues/1669>
If there’s anything else you need just let me know, cheers!