Method on_sendable

cpp/src/handler.cpp:47–47

void messaging_handler::on_container_stop(container &) {}
void messaging_handler::on_message(delivery &, message &) {}
void messaging_handler::on_sendable(sender &) {}
void messaging_handler::on_transport_close(transport &) {}
void messaging_handler::on_transport_error(transport &t) { on_error(t.error()); }
void messaging_handler::on_transport_open(transport &) {}