code: def ensure_netmiko_conn(func):
      
  
      def wrap_function(self, filename=None, config=None):
          try:
              netmiko_object = self._netmiko_device
              if netmiko_object is None:
                  raise AttributeError()
          except AttributeError:
              device_type = c.NETMIKO_MAP[self.platform]
              netmiko_optional_args = self.netmiko_optional_args
              if "port" in netmiko_optional_args:
                  netmiko_optional_args["port"] = 22
              self._netmiko_open(
                  device_type=device_type, netmiko_optional_args=netmiko_optional_args
              )
          func(self, filename=filename, config=config)
  
      return wrap_function
docs: Decorator that ensures Netmiko connection exists.