module ActiveAdmin::ResourceController::Streaming

def stream_csv
  headers['Content-Type'] = 'text/csv; charset=utf-8' # In Rails 5 it's set to HTML??
  headers['Content-Disposition'] = %{attachment; filename="#{csv_filename}"}
  stream_resource &active_admin_config.csv_builder.method(:build).to_proc.curry[self]
end