}

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

    @Override
    public void clearScroll(final ClearScrollRequest request, final ActionListener<ClearScrollResponse> listener) {
        client.clearScroll(request, listener);
    }

    @Override
    public Settings settings() {

                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }
    }

    @Override
    public void add(final String sessionId, final String url) {

                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }

        refresh();
    }

    private String getId(final String sessionId, final String url) {