It's not meant to be called from outside, but
only from Window::GetAccessible or subclasses
that override the Window::CreateAccessible
base class implementation.
Change-Id: Ifa7b6f389e2d05e6ca0a175107606afd4ae96f48
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/186964
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>