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package org.apache.kafka.streams.state;
     /**
     * Get the record associated with this key as of the specified timestamp (i.e.,
     * the existing record with the largest timestamp not exceeding the provided
     * timestamp bound).
     *
     * @param key           The key to fetch
     * @param asOfTimestamp The timestamp bound. This bound is inclusive; if a record
     *                      (for the specified key) exists with this timestamp, then
     *                      this is the record that will be returned.
     * @return The value and timestamp of the record associated with this key
     *         as of the provided timestamp, or {@code null} if no such record exists
     *         (including if the provided timestamp bound is older than this store's history
     *         retention time, i.e., the store no longer contains data for the provided
     *         timestamp). Note that the record timestamp {@code r.timestamp()} of the
     *         returned {@link VersionedRecord} may be smaller than the provided timestamp
     *         bound. Additionally, if the latest record version for the key is eligible
     *         for the provided timestamp bound, then that record will be returned even if
     *         the timestamp bound is older than the store's history retention.
     * @throws NullPointerException       If null is used for key.
     * @throws InvalidStateStoreException if the store is not initialized
     */
    VersionedRecord<V> get(K key, long asOfTimestamp);