+import FunctionValues (
+ FunctionValues( front, back, left, right, top, down, front_left,
+ front_right, front_down, front_top, back_left, back_right,
+ back_down, back_top, left_down, left_top, right_down,
+ right_top, front_left_down, front_left_top,
+ front_right_down, front_right_top, interior ),
+ empty_values )