static boolean deleteFile(@NotNull final File file) {
    Boolean result = doIOOperation(new RepeatableIOOperation<Boolean, RuntimeException>() {
      @Override
      public Boolean execute(boolean lastAttempt) {
        if (file.delete() || !file.exists()) return Boolean.TRUE;
        else if (lastAttempt) return Boolean.FALSE;
        else return null;
      }
    });
    return Boolean.TRUE.equals(result);
  }
static boolean deleteFile(@NotNull final File file)