Function chart_dignities 

pub fn chart_dignities(
    chart: &Value,
    scheme: &str,
) -> Result<ChartDignities, EngineError>

Judge the dignities of an already computed chart (its JSON, as calculate_chart returns it: planets with name, ecliptic_longitude and speed, and aspects) under scheme (“lilly” or “dorothean”). No kernel is needed: a chart stored with one scheme can be shown with the other.