def METHOD_NAME(self, loader):
    """Select DB node in the same region as loader node to query"""
    if self.params.get("region_aware_loader"):
        nodes_in_region = self.loader_set.nodes_by_region(self.node_list).get(loader.region)
        assert nodes_in_region, f"No DB nodes found in {loader.region}"
        db_nodes = [db_node for db_node in nodes_in_region if not db_node.running_nemesis]
        assert db_nodes, "No node to query, nemesis runs on all DB nodes!"
        node_to_query = random.choice(db_nodes)
        LOGGER.debug("Selected '%s' to query for local nodes", node_to_query)
        return node_to_query.cql_ip_address
    return self.node_list[0].cql_ip_address