static void configureService(ServerBuilder sb) {
        sb.service("/graphql", GraphqlService.builder().runtimeWiring(c -> {
            c.type("Query",
                   typeWiring -> typeWiring.dataFetcher("user", new UserDataFetcher()));
        }).build());

        sb.serviceUnder("/docs", DocService.builder().build());
    }
Returns a new {@link Server} instance configured with GraphQL HTTP services.

@param port the port that the server is to be bound to
examples/graphql/src/main/java/example/armeria/server/graphql/Main.java