Function immutable_seq::node::adjust

pub fn adjust<T, M, P, F>(func: F,
                          pred: P,
                          i: M,
                          node: &Node<T, M>)
                          -> Lazy<Node<T, M>> where T: Measure<M> + 'static,
        M: Add<Output=M> + Copy + 'static,
        P: Fn(M) -> bool,
        F: FnOnce(&T) -> T