Set neighbors for all the agents in all the slave environments.
        Assumes that all the slave environments have their neighbors set.

async def set_agent_neighbors(self):
        '''Set neighbors for all the agents in all the slave environments.
        Assumes that all the slave environments have their neighbors set.
        '''
        for addr in self.addrs:
            r_manager = await self.env.connect(addr)
            await r_manager.set_agent_neighbors()