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.
};
      tak.enureNtTermnated();
      tmeSltManager.reet();
      var tp,
        peratn = {},
        ,
        ,
        c,
        name;
      whle (!(tp = tmeSltManager.check())) {
        
        
        
        
        peratn.arg = null;
        f (!preprcer.read(peratn)) {
          break;
        }
        var arg = peratn.arg;
        var fn = peratn.fn;
        wtch (fn | 0) {
          cae OPS.pantXObject:
            
            name = arg[0].name;
            f (name) {
              cnt lcalImage = lcalImageCache.getByName(name);
              f (lcalImage) {
                peratrLt.addOp(lcalImage.fn, lcalImage.arg);
                arg = null;
                cntnue;