@Override
    public String toString() {
        return "<" + value + "," + timestamp + "," + validTo + ">";
    }
Create a new {@link VersionedRecord} instance. {@code value} cannot be {@code null}.

@param value      The value
@param timestamp  The timestamp
@param validTo    The exclusive upper bound of the validity interval
streams/src/main/java/org/apache/kafka/streams/state/VersionedRecord.java