public function setLevel(LoggerLevel $level = null) {
		if (isset($level)) {
			parent::setLevel($level);
		} else {
			trigger_error("log4php: Cannot set LoggerRoot level to null.", E_USER_WARNING);
		}
	}
public function setLevel(LoggerLevel $level = null) {
		if (isset($level)) {
			parent::setLevel($level);
		} else {
			trigger_error("log4php: Cannot set LoggerRoot level to null.", E_USER_WARNING);
		}
	}
public function setLevel ( LoggerLevel $ level = null ) { if ( isset ( $ level ) ) { parent :: setLevel ( $ level ) ; } else { trigger_error ( "log4php: Cannot set LoggerRoot level to null." , E_USER_WARNING ) ; } }
Override level setter to prevent setting the root logger's level to
null. Root logger must always have a level.

@param LoggerLevel $level
Override level setter to prevent setting the root logger s level to null . Root logger must always have a level .