docs: @Nonnull
    public FineUploader5Chunking setParamNameChunkSize (@Nonnull @Nonempty final String sParamNameChunkSize)
    {
      ValueEnforcer.notEmpty (sParamNameChunkSize, "ParamNameChunkSize");
      m_sChunkingParamNamesChunkSize = sParamNameChunkSize;
      return this;
    }