code: @Nonnull
    public FineUploader5Chunking setParamNameChunkSize (@Nonnull @Nonempty final String sParamNameChunkSize)
    {
      ValueEnforcer.notEmpty (sParamNameChunkSize, "ParamNameChunkSize");
      m_sChunkingParamNamesChunkSize = sParamNameChunkSize;
      return this;
    }
docs: Name of the parameter passed with a chunked request that specifies the size
  in bytes of the associated chunk.
  
  @param sParamNameChunkSize
  New value. May neither be <code>null</code> nor empty.
  @return this for chaining