code: private boolean isI18nSourceFileChanged(File sourceDirectory) {
      Scanner scanner = buildContext.newScanner(sourceDirectory);
      Scanner deleteScanner = buildContext.newDeleteScanner(sourceDirectory);
      return isI18nSourceFileChanged(scanner) || isI18nSourceFileChanged(deleteScanner);
    }
docs: Checks if and i18n source file was changes in incremental build.
  @param sourceDirectory Source directory
  @return true if changes detected