Function section_by_plane 

pub fn section_by_plane(
    model: &mut NamedModel,
    namer: &Namer,
    body: Body,
    plane: &CoordinateSystem,
    params: RemeshParams,
) -> GeopResult<WireId>

The curves where the boundary of the body body crosses the plane plane (through its origin, along its u and v), as a wire, the body left as it is: section of the body and a square of the plane reaching past the whole body. The square’s corners and sides are named N(plane,v0) … and N(plane,e0) …, its face N(plane). Fails, as section does, leaving the model as it was.