def content(options = {}, &block)
      config.set_page_presenter :index, ActiveAdmin::PagePresenter.new(options, &block)
    end
def content(options = {}, &block)
      config.set_page_presenter :index, ActiveAdmin::PagePresenter.new(options, &block)
    end
Page content.

 The block should define the view using Arbre.

 Example:

   ActiveAdmin.register "My Page" do
     content do
       para "Sweet!"
     end
   end