class ActiveAdmin::Renderer

def initialize(view_or_renderer)
  @view = view_or_renderer.is_a?(Renderer) ? view_or_renderer.view : view_or_renderer
  if view.respond_to?(:assigns)
    @assigns = view.assigns.each { |key, value| instance_variable_set("@#{key}", value) }
  else
    @assigns = {}
  end
end