public void initialize(Properties props) throws SchedulerException { if (propSrc == null) propSrc = "an externally provided properties instance.";
public void initialize() throws SchedulerException {  if (cfg != null) return; if (initException != null) throw initException;
    public void initialize(Properties props) throws SchedulerException {        if (propSrc == null)                propSrc = "an externally provided properties instance.";        this.cfg = new PropertiesParser(props);    }