code: def _rloss(
      loss_func: Callable, input_rref: rpc.RRef, target_rref: rpc.RRef
  ) -> rpc.RRef:
      return loss_func(input_rref.to_here(), target_rref.to_here())
  
imports: from typing import Callable, Dict, Tuple
  from torch import nn
  from torch.distributed import rpc
label_desc: Use image node_id 1 for calling a global function with example usage: _rloss(loss_func, input_rref, target_rref) and returns: loss_func