FATAL: Error: Not able to process media type multipart/form-data at this moment. (BodyFormData)

[lmazuel]

Crash of modelerfour on BodyForm data https://github.com/Azure/autorest.modelerfour/issues/28

[iscai-msft]

blocked on this PR Azure/autorest.modelerfour#331

After that PR is merged, all that's left to do is to look at the method's [protocol][http][multipart], and if that is true, construct the form content like this