@SuppressWarnings("unchecked")
    protected void showDocument(final DocRef docRef,
                                final MyPresenterWidget<?> documentEditPresenter,
                                final Handler closeHandler,
                                final DocumentTabData tabData,
                                final boolean fullScreen,
                                final TaskMonitorFactory taskMonitorFactory) {
        showDocument(
                docRef,
                documentEditPresenter,
                closeHandler,
                tabData,
                fullScreen,
                null,
                taskMonitorFactory);
    }
4. This method will open a document and show it in the content pane with the desired
selectedTab
stroom-core-client/src/main/java/stroom/document/client/DocumentPlugin.java