_SD_BUS_VTABLE_SIGNAL = 'S',
_SD_BUS_VTABLE_PROPERTY = 'P',
_SD_BUS_VTABLE_WRITABLE_PROPERTY = 'W',
_SD_BUS_VTABLE_SIGNAL = 'S',
_SD_BUS_VTABLE_PROPERTY = 'P',
_SD_BUS_VTABLE_WRITABLE_PROPERTY = 'W',
SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE = 1ULL << 2,
SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY = 1ULL << 3,
SD_BUS_VTABLE_UNPRIVILEGED = 1ULL << 4,
SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE = 1ULL << 2,
SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY = 1ULL << 3,
SD_BUS_VTABLE_UNPRIVILEGED = 1ULL << 4,