Function actix_service::map_config

pub fn map_config<I, SF, Req, F, Cfg>(
    factory: I, 
    f: F
) -> MapConfig<SF, Req, F, Cfg> where
    I: IntoServiceFactory<SF, Req>,
    SF: ServiceFactory<Req>,
    F: Fn(Cfg) -> SF::Config, 

Adapt external config argument to a config for provided service factory

Note that this function consumes the receiving service factory and returns a wrapped version of it.