public void clear() {
//        GWT.log(name + " - clear");
        selectionModel.clear();
        if (dataProvider != null) {
            dataProvider.getDataDisplays().forEach(hasData -> {
                hasData.setRowData(0, Collections.emptyList());
                hasData.setRowCount(0, true);
            });
        }
    }
Set the user so the screen can only show one user. No quick filter is set.
Only use on an embedded Api keys list for ONE user.
stroom-core-client/src/main/java/stroom/security/client/presenter/ApiKeysListPresenter.java