Function carboxyl_time::integrate

pub fn integrate<A, B, F>(
    a: &Signal<A>, 
    initial: B, 
    dt: Duration, 
    f: F
) -> Signal<B> where
    A: Clone + Send + Sync + 'static,
    B: Clone + Send + Sync + 'static,
    F: Fn(B, A, Duration) -> B + Send + Sync + 'static, 

Integrate a signal over time.