public FeatureListTable featureList(){
  if (featureListTable.get() == null) {
    featureListTable.compareAndSet(null,gsub.createFeatureList());
  }
  return featureListTable.get();
}

public FeatureListTable featureList ( ) { if ( featureListTable . get ( ) == null ) { featureListTable . compareAndSet ( null , gsub . createFeatureList ( ) ) ; } return featureListTable . get ( ) ; }
return information about the feature tables in this gsub table .
