layout.setWidgetTopHeight(scroll, 0, Style.Unit.PX, 100, Style.Unit.PCT);
// ---
vpanel.add(new ContentHeaderLabel("JDBC XA Datasources"));
vpanel.add(new ContentDescription(Console.CONSTANTS.subsys_jca_xadataSources_desc()));
dataSourceTable = new DefaultCellTable<XADataSource>(8,
new ProvidesKey<XADataSource>() {