src/log4php/layouts/LoggerLayoutPattern.php
public function activateOptions() {
		if (!isset($this->pattern)) {
			throw new LoggerException("Mandatory parameter 'conversionPattern' is not set.");
		}
		
		$parser = new LoggerPatternParser($this->pattern, $this->converterMap);
		$this->head = $parser->parse();
	}
public function activateOptions() {
		if (!isset($this->pattern)) {
			throw new LoggerException("Mandatory parameter 'conversionPattern' is not set.");
		}
		
		$parser = new LoggerPatternParser($this->pattern, $this->converterMap);
		$this->head = $parser->parse();
	}
Processes the conversion pattern and creates a corresponding chain of
pattern converters which will be used to format logging events.