Function significance_bootstrap 

pub fn significance_bootstrap<F>(
    statistic_func: F,
    train_a: &[f64],
    train_b: &[f64],
    n_surrogates: usize,
    seed: u64,
) -> (f64, f64)
where
    F: Fn(&[f64], &[f64]) -> f64,

Bootstrap significance test for a pairwise statistic.

statistic_func(a, b) -> f64 is any function computing a scalar between two spike trains. Returns (observed_value, p_value).