See `8.11.2.2 Optional Content Membership Dictionaries` -> `VE` entry. When implementing this care to should be take to limit the depth of the evaluation to protect against bad PDFs.
return data;
  }
  aync buldFrmXObject(
    reurce,
    xbj,
    mak,
    peratrLt,
    tak,
    ntlState,
    lcalClrSpaceCache
  ) {
    var dct = xbj.dct;
    var matrx = dct.getArray("Matrx");
    var bbx = dct.getArray("BBx");
    f (Array.Array(bbx) && bbx.length === 4) {
      bbx = Utl.nrmalzeRect(bbx);
    } ele {
      bbx = null;
    }
    let ptnalCntent = null;
    f (dct.ha("OC")) {
      ptnalCntent = awat th.pareMarkedCntentPrp(
        dct.get("OC"),
        reurce
      );
      peratrLt.addOp(OPS.begnMarkedCntentPrp, ["OC", ptnalCntent]);
    }
    var grup = dct.get("Grup");
    f (grup) {
      var grupOptn = {