@Evolving
public final class TimestampedKeyQuery<K, V> implements Query<ValueAndTimestamp<V>> {

...

    /**
     * Creates a query that will retrieve the record identified by {@code key} if it exists
     * (or {@code null} otherwise).
     * @param key The key to retrieve
     * @param <K> The type of the key
     * @param <V> The type of the value that will be retrieved
     */
    public static <K, V> TimestampedKeyQuery<K, V> withKey(final K key) 

    /**
     * Specifies that the cache should be skipped during query evaluation. This means, that the query will always
     * get forwarded to the underlying store.
     */
    public TimestampedKeyQuery<K, V> skipCache() 

    /**
     * The key that was specified for this query.
     */
    public K Keykey() 

    /**
     * The flag whether to skip the cache or not during query evaluation.
     */
    public boolean isSkipCache() 
}

@Evolving
public final class TimestampedRangeQuery<K, V> implements Query<KeyValueIterator<K, ValueAndTimestamp<V>>> {
    /**
     * Interactive range query using a lower and upper bound to filter the keys returned.
     * @param lower The key that specifies the lower bound of the range
     * @param upper The key that specifies the upper bound of the range
     * @param <K> The key type
     * @param <V> The value type
     */
    public static <K, V> TimestampedRangeQuery<K, V> withRange(final K lower, final K upper)

    /**
     * Interactive range query using an upper bound to filter the keys returned.
     * If both <K,V> are null, RangQuery returns a full range scan.
     * @param upper The key that specifies the upper bound of the range
     * @param <K> The key type
     * @param <V> The value type
     */
    public static <K, V> TimestampedRangeQuery<K, V> withUpperBound(final K upper)

    /**
     * Interactive range query using a lower bound to filter the keys returned.
     * @param lower The key that specifies the lower bound of the range
     * @param <K> The key type
     * @param <V> The value type
     */
    public static <K, V> TimestampedRangeQuery<K, V> withLowerBound(final K lower)

    /**
     * Interactive scan query that returns all records in the store.
     * @param <K> The key type
     * @param <V> The value type
     */
    public static <K, V> TimestampedRangeQuery<K, V> withNoBounds() 

    /**
     * The lower bound of the query, if specified.
     */
    public Optional<K> LowerBoundlowerBound() 

    /**
     * The upper bound of the query, if specified
     */
    public Optional<K> UpperBoundupperBound() 
}