The identifier for the specific hook which launched the current executable, as reported in the manifest.
Defined in <SDL3/SDL_system.h>
#define SDL_PROP_GLOBAL_SYSTEM_UBUNTU_TOUCH_HOOK_STRING "SDL.system.ubuntu_touch.hook"This is relevant for application packages that ship multiple applications with their desktop files; they will have the same app ID but will differ by their hook.
This macro is available since SDL 3.6.0.