public class OpenProProjectItemsStepCommandArgs 

{
  // Get the job Id associated with a running OpenProItems step for a Pro Add-In module

  // In the Add-In Module class, override the ExecuteCommandArgs(string id) method and return a Func<Object[], Task> object like the sample below
  // Refer to the Workflow Manager ProConcepts Sample Code link for an example

  Func<object[], Task> overrideFunction = (args) => QueuedTask.Run(() =>
  {
    try
    {
      // Get the jobId property from the OpenProProjectItemsStep arguments and store it.
      OpenProProjectItemsStepCommandArgs stepArgs = (OpenProProjectItemsStepCommandArgs)args[0];
      var jobId = stepArgs.JobId;
      ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show($"Got job id from ProMappingStep args: {jobId}", "Project Info");

      // Run the command specified by the id passed into ExecuteCommandArgs
      IPlugInWrapper wrapper = FrameworkApplication.GetPlugInWrapper(id);
      if (wrapper is ICommand command && command.CanExecute(null))
        command.Execute(null);
    }
    catch (Exception e)
    {
      ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show($"ERROR: {e}", "Error running command");
    }
  });

  // Use overrideFunction to get the jobId from the step args when the command is executed
}