Method on_sendable

cpp/examples/ssl_client_cert.cpp:123–128

    }

    void on_sendable(proton::sender &s) override {
        proton::message m;
        m.body("Hello World!");
        s.send(m);
        s.close();
    }

    void on_tracker_accept(proton::tracker &t) override {
        // All done.