Function surface_select_smile_delta_strike 

pub fn surface_select_smile_delta_strike<S: SurfaceSmile + ?Sized>(
    smile: &S,
    market: &SurfaceMarketContext,
    request: SurfaceSmileDeltaStrikeSelectionRequest,
    listed_strikes: &[f64],
) -> Result<SurfaceDeltaStrikeSelection, FerroRiskError>