She ate a little bit, and said anxiously to herself, `Which
way?  Which way?', holding her hand on the top of her head to
feel which way it was growing, and she was quite surprised to
find that she remained the same size:  to be sure, this generally
happens when one eats cake, but Alice had got so much into the
way of expecting nothing but out-of-the-way things to happen,
that it seemed quite dull and stupid for life to go on in the

      // Adding the gradients to the graph can alter the prefix to prevent
      // name collisions only if this prefix has not been provided explicitly
      // by the user. If it was provided, assert that it remained intact.
      if (prefix != nullptr && !absl::StartsWith(n->name(), prefix_cmp)) {
        status->status = tensorflow::errors::Internal(
            "BUG: The gradients prefix have been unexpectedly altered when "