code: def rpc_backend(self):
      return rpc.backend_registry.BackendType["FAULTY_TENSORPIPE"]
  
file_path: pytorch/torch/testing/_internal/distributed/rpc/faulty_rpc_agent_test_fixture.py
imports: import torch.distributed.rpc
  import torch.distributed.rpc._testing
  from torch.testing._internal.distributed.rpc.rpc_agent_test_fixture import RpcAgentTestFixture
label_desc: Use image node_id 2 for calling the FaultyRpcAgentTestFixture obj's underlying member method code with example usage: obj.rpc_backend() and returns: rpc