Core GraphQL APIReferenceObjectsCheckoutCustomFieldReferencetypeCheckoutCustomFieldReferenceFieldsCopy Anchor Linkfieldsfields…key*String!Copy Linkvalue?StringCopy LinkUsagesCopy Anchor LinkField ofInvoice.customFieldsSDLCopy Texttype CheckoutCustomFieldReference { key: String! value: String}CartWithPaginationPrevious PageClarityCredentialsNext Page