docs: function parse_RfX(data /*::, length*/)/*:Range*/ {
  	var cell/*:Range*/ = ({s: {}, e: {}}/*:any*/);
  	cell.s.r = data.read_shift(4);
  	cell.e.r = data.read_shift(4);
  	cell.s.c = data.read_shift(4);
  	cell.e.c = data.read_shift(4);
  	return cell;
  }