- final UnsignedLong cookie, final Optional<DataTree> dataTree, final int maxMessages) {
- super(actor, sessionId, version, maxMessages);
- this.shardName = Preconditions.checkNotNull(shardName);
- this.cookie = Preconditions.checkNotNull(cookie);
- this.dataTree = Preconditions.checkNotNull(dataTree);
+ final UnsignedLong cookie, final Optional<ReadOnlyDataTree> dataTree, final int maxMessages) {
+ super(actor, shardName, sessionId, version, maxMessages);
+ this.cookie = requireNonNull(cookie);
+ this.dataTree = requireNonNull(dataTree);