@Deprecated
  public void enableDebug(Class<?> clazz) {
    Log4jUtils.enableDebug(clazz);
  }
Switches the logger for the given class to DEBUG level.
@param clazz The class for which to switch to debug logging.
@deprecated In 2.3.0, will be removed in 4.0.0. Only support changing log level on log4j now as
            HBase only uses log4j. You should do this by your own as it you know which log
            framework you are using then set the log level to debug is very easy.
hbase-testing-util/src/main/java/org/apache/hadoop/hbase/HBaseTestingUtility.java