Array
(
    [line_type_types] => Array
        (
            [commerce_coupon] => Array
                (
                    [type] => commerce_coupon
                    [name] => Coupon
                    [description] => Coupon line item.
                    [add_form_submit_value] => Add coupon
                    [base] => commerce_coupon_line_item
                    [product] => 
                    [callbacks] => Array
                        (
                            [configuration] => commerce_coupon_line_item_configuration
                            [title] => commerce_coupon_line_item_title
                            [add_form] => commerce_coupon_line_item_add_form
                            [add_form_submit] => commerce_coupon_line_item_add_form_submit
                        )

                )

            [product] => Array
                (
                    [name] => Product
                    [description] => References a product and displays it with the SKU as the label.
                    [product] => 1
                    [add_form_submit_value] => Add product
                    [base] => commerce_product_line_item
                    [type] => product
                    [callbacks] => Array
                        (
                            [configuration] => commerce_product_line_item_configuration
                            [title] => commerce_product_line_item_title
                            [add_form] => commerce_product_line_item_add_form
                            [add_form_submit] => commerce_product_line_item_add_form_submit
                        )

                )

        )

    [product_types] => Array
        (
            [product] => Array
                (
                    [type] => product
                    [name] => Product
                    [description] => A basic product type.
                    [help] => 
                    [revision] => 1
                    [module] => commerce_product_ui
                )

            [tshirt] => Array
                (
                    [type] => tshirt
                    [name] => T-Shirt
                    [description] => A T-Shirt
                    [help] => 
                    [revision] => 1
                    [module] => commerce_product_ui
                )

            [shoe] => Array
                (
                    [type] => shoe
                    [name] => Shoe
                    [description] => A thingy worn on a foot.
                    [help] => If you need help with a shoe, something is wrong with you.
                    [revision] => 1
                    [module] => zzz_test
                )

        )

)