- public ChangeShardMembersVotingStatus(String shardName, Map<String, Boolean> meberVotingStatusMap) {
- this.shardName = Preconditions.checkNotNull(shardName);
+ public ChangeShardMembersVotingStatus(final String shardName, final Map<String, Boolean> meberVotingStatusMap) {
+ this.shardName = requireNonNull(shardName);