Jquery Plugins schreiben, Fragen und Probleme mit 'this'

(function($){

    var defaultOptions = {
        test: 1
    };

    var PluginName = (function(options) {
        function PluginName(handler, options) {

            // Extend default options.
            this.options = $.extend(defaultOptions, options);

        }

        PluginName.prototype.init = function() {
            console.log('test: ' + this.options['test']);
        };

        return PluginName;
    })();

    $.fn.PluginName = function(options) {
        this.PluginNameInstance = new PluginName(this, options || {});

        this.PluginNameInstance.init();

        return this;
    };
})(jQuery);