object @line_item
cache [I18n.locale, root_object]
attributes *line_item_attributes
node(:single_display_amount) { |li| li.single_display_amount.to_s }
node(:display_amount) { |li| li.display_amount.to_s }
node(:total, &:total)
child :variant do
  extends 'spree/api/v1/variants/small'
  attributes :product_id
end

child adjustments: :adjustments do
  extends 'spree/api/v1/adjustments/show'
end