public boolean isValidEntity( Entity entity, Game game ) {
public boolean isValidEntity( Entity entity, IGame game ) {
        public boolean isValidEntity( Entity entity, Game game ) {            // The entity must be in the mask, and pass            // the requirements of the parent class.            return (GameTurn.getClassCode(entity) & this.mask) != 0 &&                super.isValidEntity(entity, game);        }