code: def _override_options(options, **overrides):
      
      for opt, val in overrides.items():
          passed_value = getattr(options, opt, _Default())
          if opt in ('ignore', 'select') and passed_value:
              value = process_value(opt, passed_value.value)
              value += process_value(opt, val)
              setattr(options, opt, value)
          elif isinstance(passed_value, _Default):
              setattr(options, opt, process_value(opt, val))
docs: Override options.