when(mockSearchResponse.getScrollId()).thenReturn("scroll1", "scroll1");
        when(mockSearchResponse.getHits()).thenReturn(mockSearchHits);
        when(mockSearchHits.getHits()).thenReturn(new SearchHit[] { mockHit }, new SearchHit[0]);
        when(mockHit.getIndex()).thenReturn("test-index");
        when(mockHit.getId()).thenReturn("doc1");

        // Setup scroll response (empty on second call)

    /**
     * Flag indicating whether the client is connected.
     */
    private volatile boolean connected;

    /**
     * Scroll for delete operations.
     */
    protected Scroll scrollForDelete = new Scroll(TimeValue.timeValueMinutes(1));

    /**
     * Size for delete operations.
     */
    protected int sizeForDelete = 10;

    /**

        return queue.poll();
    }

    @Override
    public void close() {
        isFinished.set(true);
        queue.clear();
    }

    /**
     * Sets the scroll size.
     * @param scrollSize The scroll size.
     */
    public void setScrollSize(final int scrollSize) {
        this.scrollSize = scrollSize;
    }

    /**
     * Sets the limit of document size.

    }

    /**
     * Prepares a clear scroll request builder.
     *
     * @return the clear scroll request builder
     */
    @Override
    public ClearScrollRequestBuilder prepareClearScroll() {
        return client.prepareClearScroll();
    }

    /**
     * Clears scroll contexts asynchronously.
     *
     * @param request the clear scroll request

        this.index = index;
    }

    /**
     * Gets the scroll timeout in milliseconds.
     *
     * @return The scroll timeout.
     */
    public int getScrollTimeout() {
        return scrollTimeout;
    }

    /**
     * Sets the scroll timeout.
     * @param scrollTimeout The scroll timeout.
     */
    public void setScrollTimeout(final int scrollTimeout) {

        POPULARWORD,
        /** Favorite API format. */
        FAVORITE,
        /** Favorites API format. */
        FAVORITES,
        /** Ping API format. */
        PING,
        /** Scroll API format. */
        SCROLL,
        /** Suggest API format. */
        SUGGEST,
        /** Other API format. */
        OTHER;
    }

    /**
     * Default constructor for BaseApiManager.
     */

        }

        return true;
    }

    /**
     * Deletes the scroll context associated with the given scroll ID.
     *
     * @param client the OpenSearch client used to clear the scroll context
     * @param scrollId the ID of the scroll context to be deleted; if null, no action is taken
     */

    }

    /**
     * Scrolls through all documents in the specified index and applies the callback function to each hit.
     *
     * @param index the name of the index to scroll through
     * @param callback the function to apply to each search hit, returning true to continue or false to stop
     * @return the number of documents processed
     */

    }

    /**
     * Gets the fields that are included in scroll search responses.
     *
     * @return array of field names for scroll search responses
     */
    public String[] getScrollResponseFields() {
        return scrollResponseFields;
    }

    /**
     * Sets the fields that are included in scroll search responses.
     *

         */
        public void setClusterTimeout(final String timeout) {
            this.clusterTimeout = timeout;
        }

        /**
         * Sets the scroll timeout.
         * @param timeout The scroll timeout.
         */
        public void setScrollTimeout(final String timeout) {
            this.scrollTimeout = timeout;
        }
    }

    /**