/**
  * Set the threshold level. All log events with lower level than the threshold level are ignored
  * by the appender.
  *
  * <p>In configuration files this option is specified by setting the value of the <b>Threshold</b>
  * option to a level string, such as "DEBUG", "INFO" and so on.
  *
  * @since 0.8.3
  */
 public void setThreshold(Priority threshold) {
   appender.setThreshold(threshold);
 }