public override bool isset(Env env, ObjectValue qThis, Value index)
 {
     return(qThis.callMethod(env, OFFSET_EXISTS, index).toBoolean());
 }
 public override Value unset(Env env, ObjectValue qThis, Value index)
 {
     return(qThis.callMethod(env, OFFSET_UNSET, index));
 }
 public override Value put(Env env, ObjectValue qThis, Value index, Value value)
 {
     return(qThis.callMethod(env, OFFSET_SET, index, value));
 }