class ActiveAdmin::HasManyBuilder

def content_has_many(&block)
  form_block = proc do |form_builder|
    render_has_many_form(form_builder, options[:parent], &block)
  end
  template.assigns[:has_many_block] = true
  contents = without_wrapper { inputs(options, &form_block) }
  contents ||= "".html_safe
  js = new_record ? js_for_has_many(options[:class], &form_block) : ''
  contents << js
end