A class that represent a void cell.
Initialize self. See help(type(self)) for accurate signature.
This is a virtual method that must be implemented in deriving classes.
Return a string with the list of the attributes and their current value.
Print the model WITHOUT carriage return.
A BoardItemVoid is obviously overlappable (so player and NPC can walk over).
A BoardItemVoid is not pickable, therefor this method return false.
This is a virtual method that must be implemented in deriving class.
Store the BoardItem position for self access.