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GWT: How do I layout widgets horizontally?
tabsPanel = new TabLayoutPanel(BAR_HEIGHT_IN_EM, Style.Unit.EM);
for (final Node tabNode : documentNode.getChildren()) {
    final ScrollPanel scrollPanel = new ScrollPanel();
    ...
    Widget childWidget = createPanelFromWidgets(childWidgets);
    ...
    scrollPanel.add(childWidget);
    tabsPanel.add(scrollPanel, tabName);
}


public static Widget createPanelFromWidgets(final List<Widget> childWidgets) {
    final FlowPanel horizPanel = new FlowPanel();
    for (final Widget childWidget : childWidgets) {
        horizPanel.add(childWidget);
    }   // for
    return horizPanel;
}   // createPanelFromWidgets