class ActiveAdmin::Views::Pages::Index

page. To set this, use the :as option in the page_presenter block.
Returns the actual class for renderering the main content on the index

def find_index_renderer_class(klass)
  klass.is_a?(Class) ? klass :
    ::ActiveAdmin::Views.const_get("IndexAs" + klass.to_s.camelcase)
end