docs: public static void outMark(IRubyObject emitter, IRubyObject node) {
          Emitter emitterPtr = (Emitter)emitter.dataGetStructChecked();
          YEmitter.Extra bonus = (YEmitter.Extra)emitterPtr.bonus;
          ((RubyObject)node).fastSetInstanceVariable("@emitter", emitter);
          if(!bonus.oid.isNil()) {
              ((RubyHash)bonus.data).fastASet(bonus.oid, node);
          }
      }