default_layout

# File actionpack/lib/action_controller/layout.rb, line 175
      def default_layout(format) #:nodoc:
        layout = read_inheritable_attribute(:layout)
        return layout unless read_inheritable_attribute(:auto_layout)
        @default_layout ||= {}
        @default_layout[format] ||= default_layout_with_format(format, layout)
        @default_layout[format]
      end