define([
    'dojo/_base/declare',
    'lib/BaseWidget',
], function(
    declare,
    BaseWidget
){
    var GM = null;
    var clazz = declare([BaseWidget], {
        type: 'widget',
        constructor: function (obj) {
            console.log("constructor: ");
        },
        startup: function () {
            console.log("startup");
        },
    });
    clazz.getInstance = function (a) {
        null === GM ? GM = new clazz(a) : null;
        return GM
    };
    return clazz;
});