presto-spi/src/main/java/io/prestosql/spi/connector/ConnectorBucketNodeMap.java/ConnectorBucketNodeMap/getFixedMapping
class ConnectorBucketNodeMap:    public List<Node> getFixedMapping()
    {
        return bucketToNode.orElseThrow(() -> new IllegalArgumentException("No fixed bucket to node mapping"));
    }