What kind of JS pattern is this example? [duplicate]

This question already has an answer here:

• What is this JavaScript pattern called and why is it used? 6 answers

I was using a jQuery Framework and found code which is in the way below. Now: I understand that there is an IIFE and the return is giving an object containing several JSON/Functions. But I don't understand why the two vars are above the return? Is this some kind of private-member pattern because it cannot be accessed using the generator-variable? What kind of pattern is this? Thanks!!

$(document).ready(function() {
    var generator = (function() {

        var _eventhandler = function() {
            $('#id').keyup(function() {
                generator.validate(true);
            });
        }

        var _isAllowed= function() {
            return true;
        };

        return {
            config: {
                //config data
            },
            init: function() {
                console.log("init generator...");
            }
            validate: function {
                return true;
            }
        }
    }());

    generator.init();
});