Function fang_oost_option::option_calibration::get_obj_fn_arr

pub fn get_obj_fn_arr<'a, T>(
    phi_hat: Vec<Complex<f64>>, 
    u_array: Vec<f64>, 
    cf_fn: T
) -> impl Fn(&[f64]) -> f64 where
    T: Fn(&Complex<f64>, &[f64]) -> Complex<f64>,