OAS Conversion of formData reference parameters to request body is incorrect

[ymohdriz]

With an OAS spec like this
issue-17.txt

When an operation contains 2 reference formData parameters, both are converted to individual request body which is incorrect. Expected behavior should be to convert it to schema and then create one requestBody out of multiple formData parameters.

Thanks,
Mohammed Rizwan

[gracekarina]

fixed by #836