Function nsga2 

pub fn nsga2<F>(
    objective_function: F,
    n_objectives: usize,
    n_variables: usize,
    config: Option<MultiObjectiveConfig>,
) -> Result<MultiObjectiveResult, OptimizeError>
where
    F: Fn(&ArrayView1<'_, f64>) -> Array1<f64> + Send + Sync,

Convenience function to optimize using NSGA-II