src/log4php/LoggerLoggingEvent.php
public function getNDC() {
		if($this->ndcLookupRequired) {
			$this->ndcLookupRequired = false;
			$this->ndc = LoggerNDC::get();
		}
		return $this->ndc;
	}
public function getNDC() {
		if($this->ndcLookupRequired) {
			$this->ndcLookupRequired = false;
			$this->ndc = LoggerNDC::get();
		}
		return $this->ndc;
	}
This method returns the NDC for this event. It will return the
correct content even if the event was generated in a different
thread or even on a different machine. The {@link LoggerNDC::get()} method
should <b>never</b> be called directly.
@return string