ReadonlyactionOptional ReadonlyfieldsObject containing the Custom Fields fields for the paymentMethodInfo.
Required if at least one Custom Field is defined as required in the `fieldDefinitions` of the referenced [Type](ctp:api:type:Type).
Optional ReadonlytypeDefines the Type that extends the paymentMethodInfo with Custom Fields.
Adding or updating a Custom Type on a PaymentMethodInfo generates the PaymentMethodInfoCustomTypeSet Message, removing one generates the PaymentMethodInfoCustomTypeRemoved Message.