Method on_sender_error

cpp/src/handler.cpp:77–77

void messaging_handler::on_receiver_detach(receiver &) {}
void messaging_handler::on_sender_close(sender &) {}
void messaging_handler::on_sender_error(sender &l) { on_error(l.error()); }
void messaging_handler::on_sender_open(sender &l) {
    if (l.uninitialized()) {
        l.open(l.connection().sender_options());