private boolean isLargeEnoughForMerge(final NormalizerConfiguration normalizerConfiguration,
    final NormalizeContext ctx, final RegionInfo regionInfo) {
    return getRegionSizeMB(regionInfo) >= normalizerConfiguration.getMergeMinRegionSizeMb(ctx);
  }
Return {@code true} when {@code regionInfo} has a size that is sufficient to be considered for
a merge operation, {@code false} otherwise.
</p>
Callers beware: for safe concurrency, be sure to pass in the local instance of
{@link NormalizerConfiguration}, don't use {@code this}'s instance.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java