code: func NewStreamFileBuilder(writer io.Writer) *StreamFileBuilder {
  	return &StreamFileBuilder{
  		zipWriter:          zip.NewWriter(writer),
  		xlsxFile:           NewFile(),
  		cellTypeToStyleIds: make(map[CellType]int),
  		maxStyleId:         initMaxStyleId,
  	}
  }
docs: // NewStreamFileBuilder creates an StreamFileBuilder that will write to the the provided io.writer