Function actix_service::apply_cfg

pub fn apply_cfg<F, S, C1, C2, U>(f: F, service: U) -> ApplyConfig<F, S, C1, C2> where
    S: NewService<C2>,
    F: Fn(&C1) -> C2,
    U: IntoNewService<S, C2>, 

Create new ApplyConfig` service factory combinator