docs: @Nonnull
    public FineUploader5Chunking setParamNameTotalParts (@Nonnull @Nonempty final String sParamNameTotalParts)
    {
      ValueEnforcer.notEmpty (sParamNameTotalParts, "ParamNameTotalParts");
      m_sChunkingParamNamesTotalParts = sParamNameTotalParts;
      return this;
    }