# File lib/will_paginate/view_helpers/action_view.rb, line 72
      def infer_collection_from_controller
        collection_name = "@#{controller.controller_name}"
        collection = instance_variable_get(collection_name)
        raise ArgumentError, "The #{collection_name} variable appears to be empty. Did you " +
          "forget to pass the collection object for will_paginate?" if collection.nil?
        collection
      end