public static LeaderRecoveryState of(byte value) {
        return optionalOf(value)
            .orElseThrow(() -> new IllegalArgumentException(String.format("Value %s is not a valid leader recovery state", value)));
    }
A special value used to represent that the LeaderRecoveryState field of a
PartitionChangeRecord didn't change.
metadata/src/main/java/org/apache/kafka/metadata/LeaderRecoveryState.java