ReadonlyactionReadonlynameName of the Custom Field.
Optional ReadonlyvalueIf value is absent or null, this field will be removed if it exists.
Removing a field that does not exist returns an InvalidOperation error.
If value is provided, it is set for the field defined by name.
Adding a Custom Field to a Recurring Order generates the RecurringOrderCustomFieldAdded Message, removing one generates the RecurringOrderCustomFieldRemoved Message, and updating an existing one generates the RecurringOrderCustomFieldChanged Message.