code: def trace_grpc(tracer=None):
      
      # Wrap google.cloud._helpers.make_secure_channel
      make_secure_channel_func = getattr(_helpers, MAKE_SECURE_CHANNEL)
      make_secure_channel_wrapped = wrap_make_secure_channel(
          make_secure_channel_func, tracer)
      setattr(
          _helpers,
          MAKE_SECURE_CHANNEL,
          make_secure_channel_wrapped)
  
      # Wrap the grpc.insecure_channel.
      insecure_channel_func = getattr(grpc, INSECURE_CHANNEL)
      insecure_channel_wrapped = wrap_insecure_channel(
          insecure_channel_func, tracer)
      setattr(
          grpc,
          INSECURE_CHANNEL,
          insecure_channel_wrapped)
  
      # Wrap google.api_core.grpc_helpers.create_channel
      create_channel_func = getattr(grpc_helpers, CREATE_CHANNEL)
      create_channel_wrapped = wrap_create_channel(create_channel_func, tracer)
      setattr(
          grpc_helpers,
          CREATE_CHANNEL,
          create_channel_wrapped)
docs: Integrate with gRPC.