Is it not possible to read process parameters in callback when executing a process with ProcessModuleUtilities?

Hello,

When starting a process client-side using ProcessModuleUtilities.executeProcess, is it not possible to read process output parameters in the callback function? I tried adding an array of parameter names as resultParameterNames in the config passed to executeProcess (as well as singular resultParameterName), but that does not appear to be used here. None of the parameters passed into the callback have any info about the output parameters from the process. I assume there's some way to get these, the response passed into the callback does have a "resultParameterValues" property which is always null, no matter what I try to pass in.

Do I need to use something else like ProcessExecutor in a configuration service or call ProcessEngineService.svc directly?

Ryan