index.js
function (v) {
                        if(this[handle] !== v) {
                            Object.defineProperty(this, handle, {
                                configurable : true,
                                enumerable   : true,
                                writable     : true,
                                value        : v
                            });
                        }
                    }
function (v) {
                        if(this[handle] !== v) {
                            Object.defineProperty(this, handle, {
                                configurable : true,
                                enumerable   : true,
                                writable     : true,
                                value        : v
                            });
                        }
                    }
Allow users to overwrite the handle on a per instance basis...