Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Task-number: QTBUG-67283
Change-Id: I708fd1f9f2b73d60f57cc3568646929117825813
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Fix take unit tests to actually test the correct template instance,
add more unit tests for takeDefault.
Change-Id: I51f5b17b6478a8c1388a91840edfb9c702697b28
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
