BI.createWidget({
    type: 'bi.float_center',
    element: "#wrapper",
    items: [{
        type: "bi.label",
        text: "floatCenter与center的不同在于，它可以控制最小宽度和最大宽度",
        cls: "layout-bg1",
        whiteSpace: "normal"
    }, {
        type: "bi.label",
        text: "floatCenter与center的不同在于，它可以控制最小宽度和最大宽度",
        cls: "layout-bg2",
        whiteSpace: "normal"
    }],
    height: 300,
    hgap: 20,
    vgap: 20
});