Model class name mismatch when using special characters in API name (operationId)

Hello akash 

I was able to reproduce this issue locally, meantime a solution is made i would recommend use the original definition name instead the encoded one, the editor will point that as an error but you can still generates code and get the expected output.

So for your case you just need to use:

"schema": {
"$ref": "#/definitions/SEQ-case-investigate-review-results:ReviewresultsRequest"
}

instead:

"schema": {
"$ref": "#/definitions/SEQ-case-investigate-review-results%3AReviewresultsRequest"
}