Gets a wrapper struct with a toString method to format the provided smart union.
Boost Software License Version 1.0. See LICENSE_BOOST.txt for details. Alternatively, this file may be distributed under the terms of the Tango 3-Clause BSD License (see LICENSE_BSD.txt for details).
Copyright (c) 2018 dunnhumby Germany GmbH. All rights reserved.
Helper function for formatting a SmartUnion's active member to a string.
This function is not placed in the SmartUnion class itself so as to avoid spreading the dependency on ocean.text.convert.Formatter throughout the codebase.