code: @Nonnull
    public FineUploader5Chunking setPartSize (@Nonnegative final long nPartSize)
    {
      ValueEnforcer.isGT0 (nPartSize, "PartSize");
      m_nChunkingPartSize = nPartSize;
      return this;
    }
docs: The maximum size of each chunk, in bytes.
  
  @param nPartSize
  New value. Must be &gt; 0.
  @return this for chaining