private Region mockSplitParentRegionWithSize(Collection<Long> storeSizes) {
    final Region r = mockRegionWithSize(storeSizes);
    final RegionInfo info = r.getRegionInfo();
    when(info.isSplitParent()).thenReturn(true);
    return r;
  }
Creates a region which is the parent of a split.
@param storeSizes A list of sizes for each Store.
@return A mocked Region.
hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestFileSystemUtilizationChore.java