• TArr extends ReadonlyArray<Derived<any> | Store<any>> = ReadonlyArray<any>
• TUnwrappedArr extends UnwrapReadonlyDerivedOrStoreArray<TArr> = UnwrapReadonlyDerivedOrStoreArray<TArr>
currDepVals: TUnwrappedArr;
currDepVals: TUnwrappedArr;
prevDepVals: undefined | TUnwrappedArr;
prevDepVals: undefined | TUnwrappedArr;
prevVal: unknown;
prevVal: unknown;
undefined if it's the first run
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