std::vector<string> AnotherCompositeOp(const Scope& scope) {
  auto cop_scopes = scope.GetCompositeOpScopes("another_cop");
  const string c1 = cop_scopes.child.GetUniqueNameForOp("c1");
  const string c2 = cop_scopes.child.GetUniqueNameForOp("mul");
  return {c1, c2, LastOp(cop_scopes.last)};
}

std::vector<string> LinearOp(const Scope& scope) {
  auto cop_scopes = scope.GetCompositeOpScopes("linear");
  Scope linear = cop_scopes.child;

#include "tensorflow/core/lib/core/status_test_util.h"

namespace tensorflow {
namespace ops {
namespace {

Output Linear(const Scope& scope, Input x, Input w, Input b) {
  auto cop_scopes = scope.GetCompositeOpScopes("linear");
  auto m = MatMul(cop_scopes.child, x, w);
  return BiasAdd(cop_scopes.last, m, b);
}

void GetColocationConstraints(const Output& tensor,

  /// status().
  // TODO(skyewm): NodeBuilder is not part of public API
  void UpdateBuilder(NodeBuilder* builder) const;
  // END_SKIP_DOXYGEN

  CompositeOpScopes GetCompositeOpScopes(const string& composite_op_name) const;

  bool ok() const;

  // TODO(skyewm): Graph is not part of public API
  Graph* graph() const;

  // TODO(skyewm): Graph is not part of public API

}

Scope Scope::WithKernelLabel(const string& kernel_label) const {
  return Scope(new Impl(*this, Impl::Tags::KernelLabel(), kernel_label));
}

CompositeOpScopes Scope::GetCompositeOpScopes(
    const string& composite_op_name) const {
  if (impl()->op_name_.empty() && composite_op_name.empty()) {
    UpdateStatus(errors::InvalidArgument(
        "Cannot create composite op scopes with empty name"));