default KeyValueIterator<Windowed<K>, V> backwardFetchAll(Instant timeFrom, Instant timeTo) throws IllegalArgumentException  {
        throw new UnsupportedOperationException();
    }
Gets all the key-value pairs that belong to the windows within in the given time range in backward order
with respect to time (from end to beginning of time).

@param timeFrom the beginning of the time slot from which to search (inclusive), where iteration ends.
@param timeTo   the end of the time slot from which to search (inclusive), where iteration starts.
@return a backward iterator over windowed key-value pairs {@code <Windowed<K>, value>}, from end to beginning of time.
@throws InvalidStateStoreException if the store is not initialized
@throws NullPointerException       if {@code null} is used for any key
@throws IllegalArgumentException   if duration is negative or can't be represented as {@code long milliseconds}
streams/src/main/java/org/apache/kafka/streams/state/ReadOnlyWindowStore.java