Is TransformItems incorrectly typed?

[Rigo-m]

/**
 * Transforms the given items.
 */
export type TransformItems<TItem, TMetadata = TransformItemsMetadata> = (
  items: TItem[],
  metadata: TMetadata
) => TItem[];

If I want to pass a function like (items => items.map(item => item.someProperty)) it fails on me, because the return type from transform items except TItem to be returned as it was. Is this correct?

[Haroenv]

Not sure what you are trying to achieve by just returning item.someProperty. You can add keys, transform keys, but all the existing keys still need to exist, otherwise InstantSearch will not render correctly. Do you have the exact code you're trying to use?