if (closed) {
          return;
        }
        closed = true;
      }
      for (Map.Entry<AutoCloseable, Executor> entry : entrySet()) {
        closeQuietly(entry.getKey(), entry.getValue());
      }
      clear();
      if (whenClosed != null) {
        whenClosed.countDown();
      }
    }

    void add(@Nullable AutoCloseable closeable, Executor executor) {

    NVIDIA CUDA and NVIDIA CuDNN versions used when TensorFlow was built.

### Profiler

*   Fix a subtle use-after-free issue in `XStatVisitor::RefValue()`.

### TPU Enhancements

*   Adds 3D mesh support in TPU configurations ops.
*   Added TPU code for `FTRL` with `multiply_linear_by_lr`.
*   Silently adds a new file system registry at `gstpu`.