private void copyMissingLogs(
     JwList<String> missingFilenames, String targetPath, String sourcePath) {
   for (String e : missingFilenames) {
     String sourceFilename = JwUtility.joinPath(sourcePath, e);
     String targetFilename = JwUtility.joinPath(targetPath, e);
     File sourceFile = new File(sourceFilename);
     File targetFile = new File(targetFilename);
     JwUtility.copyFile(sourceFile, targetFile);
   }
 }