code: protected Set<String> getGeneratedFiles() {
  		Properties statusFileProps = getStatusProperties();
  		if (statusFileProps != null) {
  			return statusFileProps.stringPropertyNames();
  		}
  		return null;
  	}
docs: Returns the list of generated files from the StatusFile (defined via
  {@link #statusFile}) or <code>null</code> if no StatusFile exists.