// This field can only be set when the Service type is 'LoadBalancer'. If not set, the default load
  // balancer implementation is used, today this is typically done through the cloud provider integration,
  // but should apply for any default implementation. If set, it is assumed that a load balancer

    *   tf.data service now supports auto-sharding. Users specify the sharding
        policy with `tf.data.experimental.service.ShardingPolicy` enum. It can
        be one of `OFF` (equivalent to today's `"parallel_epochs"` mode),
        `DYNAMIC` (equivalent to today's `"distributed_epoch"` mode), or one of
        the static sharding policies: `FILE`, `DATA`, `FILE_OR_DATA`, or `HINT`
        (corresponding to values of `tf.data.experimental.AutoShardPolicy`).