docs: def run_per_switch_cmds(self, switch_cmds):
          """Applies cmds to appropriate switches
  
          This takes in a switch->cmds mapping and runs only the set of cmds
          specified for a switch on that switch. This helper is used for
          applying/removing ACLs to/from interfaces as this config will vary
          from switch to switch.
          """
          for switch_ip, cmds in switch_cmds.items():
              switch = self._switches.get(switch_ip)
              self.run_openstack_sg_cmds(cmds, switch)