Function split_plate 

pub fn split_plate() -> Program

A plate with a round hole, cut in two: the plate (plate) extruded both ways from its sketch, a line across it sketched on the plane through its middle and extruded into a face standing on its own (cut), and the plate split along that face (halves) into split(halves,0) and split(halves,1), one of them with the hole.