_LoadAddOns
status_t _LoadAddOns(StringSet& alreadyLoaded,
= _LoadAddOns(alreadyLoaded, B_USER_NONPACKAGED_ADDONS_DIRECTORY);
error = _LoadAddOns(alreadyLoaded, B_USER_ADDONS_DIRECTORY);
= _LoadAddOns(alreadyLoaded, B_SYSTEM_NONPACKAGED_ADDONS_DIRECTORY);
error = _LoadAddOns(alreadyLoaded, B_SYSTEM_ADDONS_DIRECTORY);