Represents an object that can be registered for the on_object_destroyed event. Each target has an associated defines.target_type and some have a unique identifier.
LuaEntity | LuaEquipment | LuaEquipmentGrid | LuaItem | LuaLogisticCell | LuaLogisticNetwork | LuaLogisticSection | LuaPermissionGroup | LuaPlanet | LuaPlayer | LuaRailPath | LuaRenderObject | LuaSpacePlatform | LuaSurface | LuaTrain | LuaCommandable | LuaCustomChartTag | LuaGuiElement | LuaCargoHatch | LuaSchedule | LuaTerritory | LuaSegmentedUnit