The QComVariant RAII wrapper automates lifetime management of VARIANT
structures and elements that it contains. For example, it will
call IUnknown::AddRef if a COM interface is assigned to it. It will also
clear all held resources at destruction.
Task-number: QTBUG-126530
Change-Id: I543d236293d25cbc70ff25046e553351eccfb850
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
(cherry picked from commit 717580c1985dd0804363bafb8822f82dacfb3f90)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
267e378d14