Conditional PiniaCustomProperties types based on DefineStoreOptionsBase

[alexmccabe]

I've created a plugin which allows augmenting every store a meta object and some other useful information.

export interface DefineStoreOptionsBase<S extends StateTree, Store> {
  useMeta?: boolean;
}

Each individual store then has the ability to access the custom properties:

export interface PiniaCustomProperties {
  meta: StoreMeta;
  hasError: Ref<boolean>;
  isComplete: Ref<boolean>;
  // ...
}

The thing is, since the useMeta is optional in the store options, I don't want the new custom properties to show up inside the store unless it has been set to true.

Is it possible to achieve something like this?