Adding custom method calls to the jQuery Rambling Slider

getting_and_setting.js

//Stop and start are really setters
$('#slider').ramblingSlider('stop'); // => [div#slider] for method chaining
$('#slider').ramblingSlider('start'); // => [div#slider] for method chaining
$('#slider').ramblingSlider('effect'); // => 'random'
$('#slider').ramblingSlider('option'); // => Object with all options
$('#slider').ramblingSlider('option', 'speed'); // => 400
$('#slider').ramblingSlider('effect', 'boxRain'); // => [div#slider] for method chaining
$('#slider').ramblingSlider('option', 'speed', 600); // => [div#slider] for method chaining
$('#slider').ramblingSlider('option', 'startSlide'); // => 0
$('#slider').ramblingSlider('option', 'startSlide', 2); // => throws error "Slider already running. Option 'startSlide' cannot be changed."

jquery.plugin.js

(function($){
  var methods = {
    init : function(options) { /*...*/ },
    show : function() { /*...*/ },
    hide : function( ) { /*...*/ },
    update : function(content) { /*...*/ },
  };

  $.fn.tooltip = function(method) {
    // Method calling logic
    if (methods[method]) {
      return methods[method].apply(this, Array.prototype.slice.call( arguments, 1 ));
    } else if (typeof method === 'object' || !method) {
      return methods.init.apply(this, arguments);
    } else {
      $.error('Method ' +  method + ' does not exist on jQuery.tooltip');
    }    
  };
})(jQuery);

rambling.slider.coffee

(($) ->

  publicMethods = ['stop', 'start', 'option', 'effect']

  $.fn.ramblingSlider = (options, others...) ->
    methodExists = options in publicMethods
    optionsIsString = (typeof options) is 'string'
    ramblingSlider = @data 'rambling:slider'
    isCallingGetter = (others) -> not others.length or (others.length is 1 and typeof(others[0]) is 'string')

    if ramblingSlider
      return if methodExists
        value = ramblingSlider[options](others...)
        if isCallingGetter others
          value
        else
          @
      else
        if optionsIsString
          $.error "Method '#{options}' not found."
        else
          $.error "Slider already initialized." if options
    else
      return $.error "Tried to call method '#{options}' on element without slider." if methodExists or optionsIsString

    @each (key, value) ->
      element = $ @
      return if element.data 'rambling:slider'

      ramblingSlider = new RamblingSlider @, options
      element.data 'rambling:slider', ramblingSlider

      ramblingSlider.initialize()
      ramblingSlider.run()

  RamblingSlider = (element, options) ->
    ###
    # Method definitions
    ###
)(jQuery)

start_and_stop.js

$('#slider').ramblingSlider('stop');
$('#slider').ramblingSlider('start');