docs: function parse_PtgExtraMem(blob, cce, opts) {
  	var count = blob.read_shift((opts.biff == 12) ? 4 : 2);
  	var out = [];
  	for(var i = 0; i != count; ++i) out.push(((opts.biff == 12) ? parse_UncheckedRfX : parse_Ref8U)(blob, 8));
  	return out;
  }