code: def _echo_message(stub, request):
      """Echoes user's message."""
      try:
          response = stub.Echo(request)
          print(response)
          return 0
      except grpc.RpcError as rpc_error:
          print(rpc_error)
          return -1
  
imports: from absl import app
  from absl import flags
  import grpc
  from tfx.orchestration.experimental.centralized_kubernetes_orchestrator.service.proto import service_pb2
  from tfx.orchestration.experimental.centralized_kubernetes_orchestrator.service.proto import service_pb2_grpc
label_desc: Use image node_id 1 for calling a global function with example usage: _echo_message(stub, request) and returns: int, unknown