(function() {
  // 'use strict';
  // ^ would throw error because of `arguments.callee.caller`.
  var ModuleCore = function() {};

  ModuleCore.prototype.html = function() {
    console.log(':: html');
  };

  ModuleCore.extend = function (settings, Parent) {
    var parent;

    if (typeof Parent !== 'undefined') {
      parent = new Parent();
    } else {
      parent = new ModuleCore();
    }

    var M = function() {};
    M.prototype = Object.assign(parent, settings);

    M.extend = function(settings) {
      settings.super = settings.super || function() {
        var caller = arguments.callee.caller;
        parent[caller.name].apply(this, caller.arguments);
      };
      return ModuleCore.extend.call(null, settings, M);
    };

    return M;
  };

  var m = ModuleCore.extend({
    render: function() {
      this.html();
      console.log('m1 render!', arguments);
    }
  });

  var m2 = m.extend({
    render: function() {
       // `this.super()` will automaticaly 'guess'
       // function name ('render') as well as `arguments` value.
       this.super();
       console.log('m2 render!');
    }
  });

  var foo = new m2();
  console.log(foo.render(1));
	// :: html
	// m1 render! [1]
	// m2 render!
})();