Modify typescript type

utils.d.ts

/* 
    Helpful utility type for modifying a interface defined by for example swagger, where we can't edit the type/interface directly.

    Let's say that we have the following:

    baskets: BasketTypes.ISavedBasket[];

    But the ID in `ISavedBasket` can be undefined due to the type, but this is not the real case from the API, just the type
    as a basket without id could never exsist. 

    We can override just the id like this:

    baskets: Modify<BasketTypes.ISavedBasket, {
        id: string;
    }>[];
*/
export type Modify<T, R> = Omit<T, keyof R> & R;