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Matthias Clasen authored
These are private helper functions that will be used in the following commits to get information about whether we are running in a flatpak sandbox, etc. We allow the use of GTK_USE_PORTAL=1 in the environment to force the use of portals. This can be useful for testing and debugging portal interaction. https://bugzilla.gnome.org/show_bug.cgi?id=768498
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