code: def _get_fw_from_host(self):
      host_x = self.ctx.hosts.get(
          self._fw_suffix.format(self._fw_count)
      )
      self._fw_count += 1
      return host_x
  
imports: import torch
  from typing import List, Literal
  import torch
  from fate.arch import Context
  from torch.nn.modules.module import T
label_desc: Use image node_id 4 for calling the AggLayerGuest obj's underlying member method code with example usage: obj._get_fw_from_host() and returns: host_x