Getting no suitable method found Client.execute()

[Atique]

Hi, I am using Riak KV 2.1.1 with Java client. While applying index to name space I am getting some no suitable method error.
Following the instruction from this link.
http://docs.basho.com/riak/kv/2.2.3/developing/usage/search/

My code is below:

YokozunaIndex famousIndex = new YokozunaIndex("famous", "_yz_default");
            StoreIndex storeIndex = new StoreIndex.Builder(famousIndex)
                    .build();
            client.execute(storeIndex);

Namespace streets=new Namespace("streets");
            StoreBucketPropsOperation storePropsOp = new StoreBucketPropsOperation.Builder(streets)
                    .withSearchIndex("famous")
                    .build();
            client.execute(storePropsOp);

Attached is the image of the complete error.