docs: @Nonnull
    public DiskFileItem createItem (@Nullable final String sFieldName,
                                    @Nullable final String sContentType,
                                    final boolean bIsFormField,
                                    @Nullable final String sFileName)
    {
      final DiskFileItem aFileItem = new DiskFileItem (sFieldName,
                                                       sContentType,
                                                       bIsFormField,
                                                       sFileName,
                                                       m_nSizeThreshold,
                                                       m_aRepository);
      // Add the temp file - may be non-existing if the size is below the
      // threshold
      _addTempFile (aFileItem.getTempFile ());
      return aFileItem;
    }