The wires on the guiding surface: the first is the outer boundary, every further one cuts a hole.
The face whose surface the new face is cut from.
Applies to the first wire: when true it is turned so the face is the region it encloses; when false its own direction decides.
Wires, a guiding face and a side for
shapes.face.createFaceFromWiresOnFace, which makes one face on the guiding surface with holes.