code: function _getInstance (element, options) {
    let machine;
    if (!$.data(element[0], 'plugin_' + name)) {
      machine = new JQuerySlotMachine(element[0], options);
      $.data(element[0], 'plugin_' + name, machine);
    } else {
      machine = $.data(element[0], 'plugin_' + name);
    }
    return machine;
  }
docs: /*
  Create new plugin instance if needed and return it