Function offset_solid 

pub fn offset_solid(
    topo: &mut Topology,
    solid: SolidId,
    distance: f64,
    options: OffsetOptions,
) -> Result<SolidId, OffsetError>

Offset all faces of a solid by the given signed distance.

Positive distance offsets outward (enlarges), negative inward (shrinks).

Errors

Returns OffsetError if the offset collapses the solid, any intersection fails, or the result cannot be assembled into a valid solid.