Return connections for all the agents in the slave environments.

        This is a managing function for
        :meth:`~creamas.mp.MultiEnvironment.get_connections`.

async def get_connections(self, data=True):
        """Return connections for all the agents in the slave environments.

        This is a managing function for
        :meth:`~creamas.mp.MultiEnvironment.get_connections`.
        """
        return await self.menv.get_connections(data=data, as_coro=True)