public ShardLeaderStateChanged(final @NonNull String memberId, final @Nullable String leaderId,
final @NonNull ReadOnlyDataTree localShardDataTree, final short leaderPayloadVersion) {
public ShardLeaderStateChanged(final @NonNull String memberId, final @Nullable String leaderId,
final @NonNull ReadOnlyDataTree localShardDataTree, final short leaderPayloadVersion) {