Function apply_dist_geo_layer 

pub fn apply_dist_geo_layer(
    net: &mut MulticonductorNetwork,
    layer: &GeoLayer,
) -> GeoApplyReport

Apply a GeoLayer onto a multiconductor network: matched bus points land in DistBus.location, matched line routes in DistLine.route, and the layer’s space becomes the network’s geo when anything matched. Matching follows ElementKey, with the string ids matched case insensitively (OpenDSS names are case insensitive).