def _send_event_to_all(self, action, event):
        """
        Send an event to all the client listening for notifications on all
        projects

        :param action: Action name
        :param event: Event to send
        """
        for project_listeners in self._listeners.values():
            for listener in project_listeners:
                listener.put_nowait((action, event, {}))
Send an event to all the client listening for notifications on all
        projects

        :param action: Action name
        :param event: Event to send