const SignatureDefFunctionMetadata* GetFunctionMetadata();

 private:
  friend class SavedModelAPI;
  friend class ConcreteFunctionList;

  // TODO(bmzhao): Consider adding a macro for wrapping/unwrapping
  // when moving out of experimental.
  static SignatureDefFunction* wrap(TF_SignatureDefFunction* p) {
    return reinterpret_cast<SignatureDefFunction*>(p);
  }
  static TF_SignatureDefFunction* unwrap(SignatureDefFunction* p) {

    // into TaggedValue. If we used release() we would double free.
    impl::TaggedValue tensor(std::move(x2));
    auto list = TaggedValue::List();
    // Test adding values by copying and moving.
    list.list().emplace_back(3.f);
    list.list().push_back(tensor);
    list.list().emplace_back(std::move(tensor));
    ASSERT_FALSE(x->RefCountIsOne());
  }
  ASSERT_TRUE(x->RefCountIsOne());
}

		//   b. If it is a reflect-allocated type, it points into the Go heap.
		//      Reflect is responsible for keeping a reference to
		//      the underlying type so it won't be GCd.
		// If we ever have a moving GC, we need to change this for 2b (as
		// well as scan itabs to update their itab._type fields).
		bv.Set(int32(off/int64(types.PtrSize) + 1)) // pointer in second slot

	case types.TSLICE:

fix. Even if you think it's relatively minor, it's helpful to know what people
are working on. And as mentioned above, API changes should be discussed
thoroughly before moving to code.

Some examples of types of pull requests that are immediately helpful:

  - Fixing a bug without changing a public API.
  - Fixing or improving documentation.
  - Improvements to Maven configuration.

//                  object to a tf.function method.
//                  TODO(bmzhao): Add a detailed example of this with a
//                  python tf.module before moving this out of experimental.
//  status - Set to OK on success and an appropriate error on failure.
// Returns:
//  If status is not OK, returns nullptr. Otherwise, returns a

            op->user_begin()->hasTrait<OpTrait::IsTerminator>())
          return failure();
      }
      // If the quantize op is a requantize op, it is being used in other scale
      // adjustments and should be kept. Instead, moving dequantize op before
      // the requantize op to remove the unnecessary requantize op.
      if (auto qtype =
              QuantizedType::getQuantizedElementType(q.getArg().getType())) {
        rewriter.setInsertionPoint(op);

        unscheduled_ops.erase(&unscheduled_op);
        num_partitions_after += op_partition && (scheduled_something == false);
        scheduled_something = true;
        // Schedule the operation by moving it to the start.
        unscheduled_op.moveBefore(block, next_unscheduled_op);
        if (&unscheduled_op == &*next_unscheduled_op) {
          ++next_unscheduled_op;
        }
      }
    }

	// between the new etcd member is announced and the start of the static pod running the new etcd member, because during
	// this time frame etcd gets temporary not available (only when moving from 1 to 2 members in the etcd cluster).
	// From https://coreos.com/etcd/docs/latest/v2/runtime-configuration.html
	// "If you add a new member to a 1-node cluster, the cluster cannot make progress before the new member starts

    // with the last element of the heap, toTrickle.
    // Since the last element of the heap is from the bottom level, we
    // optimistically fill index position with elements from lower levels,
    // moving the hole down. In most cases this reduces the number of
    // comparisons with toTrickle, but in some cases we will need to bubble it
    // all the way up again.
    int vacated = heap.fillHoleAt(index);

  if (FindCompilePredecessor(func_op, preprocess_op)) return success();

  auto original_launch_op =
      llvm::dyn_cast<tf_device::LaunchOp>(preprocess_op->getParentOp());
  // Device of original launch looked up before moving the preprocessing ops
  // around.
  StringAttr device =
      original_launch_op->getAttrOfType<StringAttr>(kDeviceAttr);

  if (!device) {
    return original_launch_op->emitOpError()