module Concrete:sig..end
val supported : boolmodule CPoint:sig..end
module CPath:sig..end
val float_of_num : Num.t -> float
val cpoint_of_point : Point.t -> CPoint.tval cpath_of_path : Path.t -> CPath.tval num_of_float : float -> Num.tval point_of_cpoint : CPoint.t -> Point.tval path_of_cpath : CPath.t -> Path.t