presto-main/src/main/java/io/prestosql/sql/planner/NodePartitioningManager.java/NodePartitioningManager/listPartitionHandles
class NodePartitioningManager:    public List<ConnectorPartitionHandle> listPartitionHandles(
            Session session,
            PartitioningHandle partitioningHandle)
    {
        ConnectorNodePartitioningProvider partitioningProvider = partitioningProviders.get(partitioningHandle.getConnectorId().get());
        return partitioningProvider.listPartitionHandles(
                partitioningHandle.getTransactionHandle().orElse(null),
                session.toConnectorSession(partitioningHandle.getConnectorId().get()),
                partitioningHandle.getConnectorHandle());
    }