<%= stylesheet_link_tag "application", :media => "all" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
<%= content_for_with_default :top_content do %>
This is default top_content.
<% end %>
<%= content_for_with_default :main_content do %>
This is default main_content.
<% end %>
<%= yield %>