code: function write_sty_bin(wb, opts) {
  	var ba = buf_array();
  	write_record(ba, "BrtBeginStyleSheet");
  	write_FMTS_bin(ba, wb.SSF);
  	write_FONTS_bin(ba, wb);
  	write_FILLS_bin(ba, wb);
  	write_BORDERS_bin(ba, wb);
  	write_CELLSTYLEXFS_bin(ba, wb);
  	write_CELLXFS_bin(ba, opts.cellXfs);
  	write_STYLES_bin(ba, wb);
  	write_DXFS_bin(ba, wb);
  	write_TABLESTYLES_bin(ba, wb);
  	write_COLORPALETTE_bin(ba, wb);
  	/* FRTSTYLESHEET*/
  	write_record(ba, "BrtEndStyleSheet");
  	return ba.end();
  }
docs: /* [MS-XLSB] 2.1.7.50 Styles