code: def add_additional_options(cls, parser):
          
          group = OptionGroup(parser, "Target Engine Options",
                              "These options are not required, but may be "
                              "provided if a specific "
                              "BPMN application engine is targeted.")
          group.add_option("-e", "--target-engine", dest="target_engine",
                           help="target the specified BPMN application engine")
          group.add_option(
              "-t", "--target-version", dest="target_engine_version",
              help="target the specified version of the BPMN application engine")
          parser.add_option_group(group)
docs: Override in subclass if required.