@Override
  public @NotNull OutputStream getOutputStream(final Object requestor, final long modStamp, final long timeStamp) throws IOException {
    checkNotTooLarge(requestor);
    return VfsUtilCore.outputStreamAddingBOM(owningPersistentFS().getOutputStream(this, requestor, modStamp, timeStamp), this);
  }
@Override
  public @NotNull OutputStream getOutputStream(final Object requestor, final long modStamp, final long timeStamp)