Function keepPreviousData

packages/query-core/src/utils.ts:394–398

(
  previousData: T | undefined,
)

}

export function keepPreviousData<T>(
  previousData: T | undefined,
): T | undefined {
  return previousData
}

export function addToEnd<T>(items: Array<T>, item: T, max = 0): Array<T> {
  const newItems = [...items, item]