@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    super.fromData(in, context);
    bucketId = in.readInt();
  }
Sends a PartitionedRegion message to fetch all the entries for a bucketId

@param recipient the member that the fetch keys message is sent to
@param r the PartitionedRegion that contains the bucket
@param bucketId the identity of the bucket that contains the entries to be returned
@return the processor used to read the returned entries
@throws ForceReattemptException if the peer is no longer available
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/FetchEntriesMessage.java