// resources (mostly TensorArray and Stack, used in while loop gradients in
// graph mode). Calling this on a context tells it to start a step.
TF_CAPI_EXPORT extern void TFE_ContextStartStep(TFE_Context* ctx);

// Ends a step. When there is no active step (that is, every started step has
// been ended) step containers will be cleared. Note: it is not safe to call

  /// structure in Section 4).
  ///
  /// Plugins:
  ///   * Must set `status` to `TF_OK` if transaction successfuly started.
  ///   * Must set `status` to `TF_FAILED_PRECONDITION` if multiple transactions
  ///     are not supported
  ///   * Might use any other error value for `status` to signal other errors.
  int (*start_transaction)(const TF_Filesystem* filesystem,
                           TF_TransactionToken** token, TF_Status* status);