code: def append_prefix(prefix: str, name: str) -> str:
      """
      Appends provided prefix to provided name.
      """
  
      if prefix != "" and name != "":
          return prefix + "." + name
      else:
          return prefix + name
  
imports: import copy
  import logging
  from collections import OrderedDict
  from itertools import accumulate
  from typing import Any, Dict, List, Optional, Set, Type, TypeVar, Union
  import torch
  from fbgemm_gpu.split_embedding_configs import EmbOptimType
  from torch import nn
  from torchrec import optim
  from torchrec.distributed.embedding_types import EmbeddingComputeKernel
  from torchrec.distributed.types import DataType, ParameterSharding, ShardedModule, ShardingType
  from torchrec.modules.embedding_configs import data_type_to_sparse_type
  from torchrec.types import CopyMixIn
label_desc: Use image node_id 2 for calling a global function with example usage: append_prefix(prefix, name) and returns: unknown, unknown