package com.vaadin.tests.widgetset.client; import com.google.gwt.dom.client.Document; import com.google.gwt.dom.client.SpanElement; import com.vaadin.client.ui.ui.UIConnector; import com.vaadin.shared.ui.Connect; import com.vaadin.ui.UI; @Connect(UI.class) public class CustomUIConnector extends UIConnector { @Override protected void init() { super.init(); registerRpc(CustomUIConnectorRpc.class, () -> { SpanElement span = Document.get().createSpanElement(); span.setInnerText("This is the " + CustomUIConnector.this.getClass().getSimpleName()); Document.get().getBody().insertFirst(span); }); } }