code: def _check_custom_url_parameters(self):
          
          for param in self.custom_url_params:
              if param not in CustomUrlParam:
                  raise ValueError('Parameter %s is not a valid custom url parameter. Please check and fix.' % param)
  
          if self.service_type is ServiceType.FIS and CustomUrlParam.GEOMETRY in self.custom_url_params:
              raise ValueError('{} should not be a custom url parameter of a FIS request'.format(CustomUrlParam.GEOMETRY))
docs: Checks if custom url parameters are valid parameters.
  
          Throws ValueError if the provided parameter is not a valid parameter.