def index(options = {}, &block)
      options[:as] ||= :table
      config.set_page_presenter :index, ActiveAdmin::PagePresenter.new(options, &block)
    end
def index(options = {}, &block)
      options[:as] ||= :table
      config.set_page_presenter :index, ActiveAdmin::PagePresenter.new(options, &block)
    end
Configure the index page for the resource