code: def set_params(self, prog=None, params=""):
          
          dest_prog = "to {0}".format(prog) if prog else ""
          self.add_option("--params", dest="extra", default=params,
                  help="Extra parameters to pass {0}".format(dest_prog) + \
                       " (these WILL NOT be validated)")
docs: Add --params options for given command line programs