Is this object valid? This Lua object holds a reference to an object within
the game engine. It is possible that the game-engine object is removed whilst
a mod still holds the corresponding Lua object. If that happens, the object
becomes invalid, i.e. this attribute will be false
. Mods are advised to
check for object validity if any change to the game state might have occurred
between the creation of the Lua object and its access.