def METHOD_NAME(self, instance):
    # Get the configuration for this specific instance
    scraper_config = self.get_scraper_config(instance)
    # We should be specifying metrics for checks that are vanilla OpenMetricsBaseCheck-based
    if not scraper_config['metrics_mapper']:
        raise CheckException(
            "You have to collect at least one metric from the endpoint: {}".format(scraper_config['prometheus_url'])
        )
    self.process(scraper_config)