@Override
  public void deregisterChildren(ConfigurationManager manager) {
    if (regionNormalizer instanceof ConfigurationObserver) {
      final ConfigurationObserver observer = (ConfigurationObserver) regionNormalizer;
      manager.deregisterObserver(observer);
    }
  }
Consumes normalization request targets ({@link TableName}s) off the
{@link RegionNormalizerWorkQueue}, dispatches them to the {@link RegionNormalizer}, and executes
the resulting {@link NormalizationPlan}s.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/RegionNormalizerWorker.java