docs: def get_help(self):
          """
          Get context help, depending on the current step. If no help for current step
          was specified in scenario description file, default one will be returned.
          """
          current_state = self.get_current_state()
          if current_state is None:
              return statement(INTERNAL_ERROR_MSG)
          else:
              try:
                  return choice(self._scenario_steps[current_state]['help'])
              except KeyError:
                  return choice(self._default_help)