widget constructor

(function ($, Namespace) {
  'use strict';
  var slice = Array.prototype.slice;

  function widget (widgetName, constructor) {
    var namespace = 'fifty.' + widgetName;

    return function (options) {
      var $el = $(this),
        args = slice.call(arguments),
        // get the current instance or create a new one
        widget = $el.data(namespace) || $el.data(namespace, constructor.apply(this, args)),
        methodReturn;

      // execute methods and return the method return or this element for chaining
      if (typeof options == 'string') {
        methodReturn = widget[options].apply(this, args.slice(1, args.length - 1)); // don't include method name
        return methodReturn ? methodReturn : $el;
      }

      // return the widget instance by default
      return widget;
    };
  }

  Namespace.widget = widget;
})(jQuery, Namespace);

(function ($, Namespace) {
  
  function Module (options) {
    // keep reference to element in closure to be used within module
    var $el = $(this);
    
    function method () {}
    
    // public methods
    return {
      method: method
    };
  }
  
  $.fn.module = Namepace.widget('module', Module);
})(jQuery, Namespace);

// initializing
var $myPlugin = $('#el').module({});

// I can call the module methods like this
$myPlugin.module().method();