array(4) { ["type"]=> string(8) "products" ["label"]=> string(8) "Subtotal" ["amount"]=> float(0) ["value"]=> string(7) "€0.00" }
NULL
array(4) { ["type"]=> string(8) "shipping" ["label"]=> string(8) "Shipping" ["amount"]=> int(0) ["value"]=> string(4) "Free" }
Reference: E021
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