Function edge_carrier_dimensions_native 

pub fn edge_carrier_dimensions_native(
    handle: u32,
    edge_name: &str,
) -> Result<Option<CarrierDimensions>, String>

The circle a resident solid’s named edge lies on, when it does: radius, diameter and an arc’s sweep (see crate::curve_carrier_dimensions). Ok(None) for a line or any other curve; errs if no edge carries edge_name.