@Override
  protected boolean canSplit() {
    return false;
  }
A {@link RegionSplitPolicy} that disables region splits. This should be used with care, since it
will disable automatic sharding. Most of the time, using {@link ConstantSizeRegionSplitPolicy}
with a large region size (10GB, etc) is safer.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DisabledRegionSplitPolicy.java