public void clearSelectionModel() {
        if (selectionHandler != null) {
            selectionHandler.removeHandler();
            selectionHandler = null;
        }
        selectionModel = null;
    }
Clear the {@link SelectionModel} without updating the view.
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/HasDataPresenter.java