code: private String buildIndexName(String bucketName)
      {
          if (bucketName == null)
          {
              throw new KunderaException("Bucket Name can't be null!");
          }
          return (bucketName + CouchbaseConstants.INDEX_SUFFIX).toLowerCase();
      }
docs: Builds the index name.
  
  @param bucketName
  the bucket name
  @return the string