def METHOD_NAME(self, conf: ConfigTree) -> None:
    conf = conf.with_fallback(EventBridgeExtractor.DEFAULT_CONFIG)
    boto3.setup_default_session(
        region_name=conf.get(EventBridgeExtractor.REGION_NAME_KEY)
    )
    self._schemas = boto3.client("schemas")
    self._registry_name = conf.get(EventBridgeExtractor.REGISTRY_NAME_KEY)
    self._extract_iter: Union[None, Iterator] = None