private Map<PartitionedRegion, InternalPRInfo> fetchDetails(InternalCache cache) {
    LoadProbe probe = cache.getInternalResourceManager().getLoadProbe();
    Map<PartitionedRegion, InternalPRInfo> detailsMap =
        new LinkedHashMap<>(colocatedRegions.size());
    for (PartitionedRegion colocatedRegion : colocatedRegions) {
      if (ColocationHelper.isColocationComplete(colocatedRegion)) {
        InternalPRInfo info =
            colocatedRegion.getRedundancyProvider().buildPartitionedRegionInfo(true, probe);
        detailsMap.put(colocatedRegion, info);
      }
    }
    return detailsMap;
  }
For FPR we will creatd buckets and make primaries as specified by FixedPartitionAttributes. We
have to just create buckets and make primaries for the local node.

@return the details of the rebalance.
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/PartitionedRegionRebalanceOp.java