<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
             xmlns:g="urn:import:com.google.gwt.user.client.ui">

  <ui:style>
    .mainPanel {
      margin-top: 10px;
      width: 100%;
    }
  </ui:style>

  <g:FlowPanel ui:field="mainPanel" addStyleNames="{style.mainPanel}">
    
  </g:FlowPanel>
  
</ui:UiBinder>