data FlexibleDrawing = FlexD Size Bool Bool (Rect -> [DrawCommand]) instance Graphic FlexibleDrawing
Apart from the drawing function, the values of this type include the desired size, and whether the size should be fixed horizontally and/or vertially.
Values of this type are more useful as part of Drawings than by themselves.
Types Drawing, FixedDrawing, DrawCommand.
Some flexible drawings: filler, lbrace, et al.