docs: function parse_PtgAttrChoose(blob, length, opts)/*:Array<number>*/ {
  	blob.l +=2;
  	var offset = blob.read_shift(opts && opts.biff == 2 ? 1 : 2);
  	var o/*:Array<number>*/ = [];
  	/* offset is 1 less than the number of elements */
  	for(var i = 0; i <= offset; ++i) o.push(blob.read_shift(opts && opts.biff == 2 ? 1 : 2));
  	return o;
  }