code: func (s *Server) InitRouter(routers ...router.Router) {
  	s.routers = append(s.routers, routers...)
  
  	m := s.createMux()
  	s.routerSwapper = &routerSwapper{
  		router: m,
  	}
  }
docs: // InitRouter initializes the list of routers for the server.
  // This method also enables the Go profiler.