@Override
      public @NotNull T getValue() {
        T value = this.value;
        if (value == null) {
          RecursionGuard.StackStamp stamp = RecursionManager.markStack();
          value = compute();
          if (stamp.mayCacheNow()) {
            this.value = value;
          }
        }
        return value;
      }
@Override
      public @NotNull T getValue()