display = new HostsDisplay();
pager = new HostsPager();
pager.setDisplay(display);
pager.setPageSize(TopologyPresenter.VISIBLE_HOSTS_COLUMNS);
layout.addContent("topology", container);
// ---------------------
DefaultTabLayoutPanel tabLayoutpanel = new DefaultTabLayoutPanel(40, Style.Unit.PX);
tabLayoutpanel.addStyleName("default-tabpanel");