clear_persistent_model_associations

# File actionpack/lib/action_controller/session_management.rb, line 150
      def clear_persistent_model_associations #:doc:
        if defined?(@_session) && @_session.respond_to?(:data)
          session_data = @_session.data

          if session_data && session_data.respond_to?(:each_value)
            session_data.each_value do |obj|
              obj.clear_association_cache if obj.respond_to?(:clear_association_cache)
            end
          end
        end
      end