Function cf_functions::cir::cir_leverage_jump

pub fn cir_leverage_jump(
    u: &Complex<f64>, 
    cf: &dyn Fn(&Complex<f64>) -> Complex<f64>, 
    t: f64, 
    v0: f64, 
    correlation: f64, 
    expected_value_of_cf: f64, 
    a: f64, 
    sigma: f64, 
    lambda: f64, 
    num_steps: usize
) -> Complex<f64>