build environment of the currently installed TensorFlow package, e.g. the
    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`.

  const std::string subdir = io::JoinPath(base, "SubDir");
  tf_gcs_filesystem::CreateDir(filesystem_, subdir.c_str(), status_);
  EXPECT_TF_OK(status_);
  const std::string subfile = io::JoinPath(subdir, "TestSubFile.csv");
  WriteString(subfile, "test");
  EXPECT_TF_OK(status_);

  char** entries;
  auto num_entries = tf_gcs_filesystem::GetChildren(filesystem_, base.c_str(),