code: public boolean usesStandardModel(XLog log) {
  		String model = extractModel(log);
  		if (model == null) {
  			return false;
  		} else if (model.trim().equals(VALUE_MODEL_STANDARD)) {
  			return true;
  		} else {
  			return false;
  		}
  	}
docs: Checks, whether a given log uses the standard model for lifecycle
  transitions.
  
  @param log
  Log to be checked.
  @return Returns true, if the log indeed uses the standard lifecycle
  model.