functional/agent/server.go
func (srv *Server) Stop() {
	srv.lg.Info("gRPC server stopping", zap.String("address", srv.address))
	srv.grpcServer.Stop()
	srv.lg.Info("gRPC server stopped", zap.String("address", srv.address))
}
func (srv *Server) Stop() {
	srv.lg.Info("gRPC server stopping", zap.String("address", srv.address))
	srv.grpcServer.Stop()
	srv.lg.Info("gRPC server stopped", zap.String("address", srv.address))
}
// Stop stops serving gRPC server.