*   Renames `experimental_hints` in
        `tf.distribute.StrategyExtended.reduce_to`,
        `tf.distribute.StrategyExtended.batch_reduce_to`,
        `tf.distribute.ReplicaContext.all_reduce` to `options`.
    *   Renames `tf.distribute.experimental.CollectiveHints` to
        `tf.distribute.experimental.CommunicationOptions`.
    *   Renames `tf.distribute.experimental.CollectiveCommunication` to

     - `.extenders[*].httpTimeout` is of type `metav1.Duration`.
     - `.extenders[*].enableHttps` is renamed to `.extenders[*].enableHTTPS`.
   - `RequestedToCapacityRatio` args decoding is case sensitive. All fields are affected.
   - `DefaultPodTopologySpread` plugin is renamed to `SelectorSpread`.
   - `Unreserve` extension point is removed from Profile definition. All `Reserve`

		{"(*Reader).ReadByte", Method, 0},
		{"(*Reader).ReadBytes", Method, 0},
		{"(*Reader).ReadLine", Method, 0},
		{"(*Reader).ReadRune", Method, 0},
		{"(*Reader).ReadSlice", Method, 0},
		{"(*Reader).ReadString", Method, 0},
		{"(*Reader).Reset", Method, 2},
		{"(*Reader).Size", Method, 10},
		{"(*Reader).UnreadByte", Method, 0},
		{"(*Reader).UnreadRune", Method, 0},
		{"(*Reader).WriteTo", Method, 1},

  let summary = [{
V2 format specific: merges the metadata files of sharded checkpoints.  The
  }];

  let description = [{
result is one logical checkpoint, with one physical metadata file and renamed
data files.

Intended for "grouping" multiple checkpoints in a sharded checkpoint setup.

If delete_old_dirs is true, attempts to delete recursively the dirname of each