docs: void defineAttributesForStrictMode() {
          Context cx = Context.getContext();
          if (!cx.isStrictMode()) {
              return;
          }
          setGetterOrSetter("caller", 0, new ThrowTypeError("caller"), true);
          setGetterOrSetter("caller", 0, new ThrowTypeError("caller"), false);
          setGetterOrSetter("callee", 0, new ThrowTypeError("callee"), true);
          setGetterOrSetter("callee", 0, new ThrowTypeError("callee"), false);
          setAttributes("caller", DONTENUM | PERMANENT);
          setAttributes("callee", DONTENUM | PERMANENT);
          callerObj = null;
          calleeObj = null;
      }