public static boolean isColumnHidden(Class<?> controllerClass,String columnName){
  return hiddenColumnsCache.contains(getColumnHash(controllerClass,columnName));
}

public static boolean isColumnHidden ( Class < ? > controllerClass , String columnName ) { return hiddenColumnsCache . contains ( getColumnHash ( controllerClass , columnName ) ) ; }
returns if the cache has any knowledge if the column is hidden .
