docs: @Nonnull
    public FineUploader5Chunking setParamNamePartByteOffset (@Nonnull @Nonempty final String sParamNamePartByteOffset)
    {
      ValueEnforcer.notEmpty (sParamNamePartByteOffset, "ParamNamePartByteOffset");
      m_sChunkingParamNamesPartByteOffset = sParamNamePartByteOffset;
      return this;
    }