code: @Nonnull
    public FineUploader5Request setTotalFileSizeName (@Nonnull @Nonempty final String sTotalFileSizeName)
    {
      ValueEnforcer.notEmpty (sTotalFileSizeName, "TotalFileSizeName");
      m_sRequestTotalFileSizeName = sTotalFileSizeName;
      return this;
    }
docs: The name of the parameter passed that specifies the total file size in
  bytes.
  
  @param sTotalFileSizeName
  New value. May neither be <code>null</code> nor empty.
  @return this