Ext.define('BaseContainer', {
    extend: 'Ext.Container',
    constructor: function (config) {
        var me = this;
        console.log("BaseContainer", me)
        me.callParent(arguments);

    }
});

Ext.define('FirstExtendedContainer', {
    extend: 'BaseContainer',
    constructor: function (config) {
        var me = this;
        console.log("FirstExtendedContainer", me)

        me.callParent(arguments);

    }
})

Ext.define('SecondExtendedContainer', {
    extend: 'FirstExtendedContainer',
    constructor: function (config) {
        var me = this;
        console.log("SecondExtendedContainer", me)

        me.callParent(arguments);

    }
})