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SysTreeStore = function (config) {
};
Ext.define('SysTreeStore', {
    extend: 'Ext.data.TreeStore',
    defaults: {
        storeId: 'MyTreeStore',
        extraParams: "",
        fields: ["id", "text", "leaf", "expanded"]
    },
    constructor: function (config) {
        var me = this;
        Ext.apply(me, config || {}, me.defaults);
        me.callParent([Ext.apply({
            proxy:
            new Ext.data.HttpProxy
            (
                {
                    type: 'ajax',
                    url: cmdUrl,
                    extraParams: config.extraParams
                }
            )
        }, config)]);
    }
});