Create event handler is not called. Extending jQueryUI Dialog

declare

(function ($) {
    $.widget('my.popup', $.ui.dialog, {
        'create': function (event, ui) {
            // this one is NOT called
            console.debug('create');
        },
        '_create': function () {
            // OK
            console.debug('_create');

           return this._super();
        }
    });
}(jQuery));

call

var div = jQuery('<div>').appendTo('body');
div.on('widgetcreate', function (event, ui) {
    // this one is NOT called
    console.debug('widgetcreate');
});
div.on('popupcreate', function (event, ui) {
    // OK
    console.debug('popupcreate');
});
div.popup();

I can understand why 'widgetcreate' does not work, but 'create' in options? jQuery.Widget has create (http://ift.tt/1FIOGLN) and I guess dialog should inherit it and fire it internally with proper new name.

What is the problem?