Unable to specify output file for contracts classes

[travis-practiceprofiles]

I'm not sure if I've just misunderstood something, or whether I've encountered a bug. As far as I can tell there's no way to specify the path of the contracts output file when working with OpenApiReference.

If I use the option "Contracts.cs", that gets passed through as an argument to openapi2csclient like this: "/contractsOutputFilePath:Contracts.cs". But openapi2csclient does not recognise that argument, and generates an exception: ">NConsole.UnusedArgumentException: Unrecognised arguments are present: [/contractsOutputFilePath:Contracts.cs]"

openapi2csclient expects an argument named contractsOutput, which would look like this: "/contractsOutput:Contracts.cs". But "Contracts.cs" is not passed through to the generated command. I can see from the source code ([https://github.com/RicoSuter/NSwag/blob/master/src/NSwag.ApiDescription.Client/NSwag.ApiDescription.Client.targets]) that NSwagContractsOutputFilePath is what is expected there.

I have wondered whether I've managed to reference incompatible versions of the various libraries in my project, but I haven't found any alternative versions that would seem to resolve this. Am I missing something? Or is this parameters in different projects that have gotten out of sync at some point?

I'm guessing that maybe this option is not used very much.