client.explain(request, listener);
    }

    @Override
    public ClearScrollRequestBuilder prepareClearScroll() {
        return client.prepareClearScroll();
    }

    @Override
    public ActionFuture<ClearScrollResponse> clearScroll(final ClearScrollRequest request) {
        return client.clearScroll(request);
    }

        when(mockBulkFuture.actionGet(anyLong(), any(TimeUnit.class))).thenReturn(mockBulkResponse);
        when(mockBulkResponse.hasFailures()).thenReturn(false);

        // Setup clear scroll
        when(mockClient.prepareClearScroll()).thenReturn(mockClearScrollBuilder);
        when(mockClearScrollBuilder.addScrollId(any(String.class))).thenReturn(mockClearScrollBuilder);
        doAnswer(invocation -> {

    /**
     * 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
     * @return a future for the clear scroll response

        } finally {
            deleteScrollContext(scrollId);
        }
    }

    protected void deleteScrollContext(final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(() -> {}));
        }
    }

    @Override
    protected Number doReadNextVal() {

        } finally {
            deleteScrollContext(scrollId);
        }
    }

    protected void deleteScrollContext(final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(() -> {}));
        }
    }

    @Override
    protected Number doReadNextVal() {

     */
    public static void deleteScrollContext(final Client client, final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(res -> {}, e -> {}));
        }
    }

    /**
     * Escapes wildcard characters in the given query string.
     *

        } finally {
            deleteScrollContext(scrollId);
        }
    }

    protected void deleteScrollContext(final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(() -> {}));
        }
    }

    @Override
    protected Number doReadNextVal() {