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