code: @Override
      public List<String> onQueryReceived(@NonNull QueryToken queryToken) {
          List<String> buckets = null;
          // Pass the query token to a host receiver
          if (mHostQueryTokenReceiver != null) {
              buckets = mHostQueryTokenReceiver.onQueryReceived(queryToken);
              mSuggestionsAdapter.notifyQueryTokenReceived(queryToken, buckets);
          }
          return buckets;
      }
docs: {@inheritDoc}