else:
    importlib.import_module("keras.src.optimizers")
except (ImportError, AttributeError):
  pass

del importlib

# Delete modules that should be hidden from dir().
# Don't fail if these modules are not available.
# For e.g. this file will be originally placed under tensorflow/_api/v1 which
# does not have "python", "core" directories. Then, it will be copied

    Thread.sleep(100)
    for (t in taskRunnerThreads) {
      t.interrupt()
    }
    Thread.sleep(100)
    assertThat(taskRunner.activeQueues()).isEmpty()
  }

  /** Use a helper method so there's no hidden reference remaining on the stack.  */
  private fun allocateAndLeakAllocation(
    pool: ConnectionPool,
    connection: RealConnection,
  ) {
    val client =
      OkHttpClient
        .Builder()

if _os.getenv("TF_PLUGGABLE_DEVICE_LIBRARY_PATH", ""):
  _ll.load_pluggable_device_library(
      _os.getenv("TF_PLUGGABLE_DEVICE_LIBRARY_PATH")
  )

# Delete modules that should be hidden from dir().
# Don't fail if these modules are not available.
# For e.g. this file will be originally placed under tensorflow/_api/v1 which
# does not have "python", "core" directories. Then, it will be copied

     * - Temporarily change this test:
     * --- Comment out assertEquals.
     * --- System.out.println(input + " " + simplifyPath(input));
     * --- fail(). (If the test were to pass, its output would be hidden.)
     * - Run the test.
     * - Pull the relevant lines of output from the test into a testcases file.
     * - Test the output:
     * --- cat testcases | while read L; do
     *       X=($L)

                "                <img src=\"https://fast.wistia.com/embed/medias/$2/swatch\" style=\"filter:blur(5px);height:100%;object-fit:contain;width:100%;\" alt=\"$1\" aria-hidden=\"true\" onload=\"this.parentNode.style.opacity=1;\" /> \n" +
                "        </div></div></div></div> \n" +
                "    </div> \n" +
                "  </div> \n" +
                "</details>");

		return false
	}
	if vers == 0 {
		return true
	}
	hidden := true

	var xl xlMetaV2VersionHeader
	_ = decodeVersions(buf, vers, func(idx int, hdr, _ []byte) error {
		if _, err := xl.unmarshalV(headerV, hdr); err != nil {
			return errDoneForNow
		}
		if topDeleteMarker && idx == 0 && xl.Type == DeleteType {
			hidden = true
			return errDoneForNow
		}
		if !xl.FreeVersion() {

This practice is common enough that it has a name, these environment variables are commonly placed in a file `.env`, and the file is called a "dotenv".

/// tip

A file starting with a dot (`.`) is a hidden file in Unix-like systems, like Linux and macOS.

But a dotenv file doesn't really have to have that exact filename.

///

 *       rate when using completely <i>random</i> sample input. The true test of a hash function is
 *       how it performs on representative real-world data, which tends to contain many hidden
 *       patterns and clumps. The goal of a good hash function is to stamp these patterns out as
 *       thoroughly as possible.
 *   <li><b>bit-dispersing:</b> masking out any <i>single bit</i> from a hash code should yield only

 *       rate when using completely <i>random</i> sample input. The true test of a hash function is
 *       how it performs on representative real-world data, which tends to contain many hidden
 *       patterns and clumps. The goal of a good hash function is to stamp these patterns out as
 *       thoroughly as possible.
 *   <li><b>bit-dispersing:</b> masking out any <i>single bit</i> from a hash code should yield only

* <abbr title="A group of machines that are configured to be connected and work together in some way.">cluster</abbr>
* <abbr title="A method of machine learning that uses artificial neural networks with numerous hidden layers between input and output layers, thereby developing a comprehensive internal structure">Deep Learning</abbr>

### The abbr gives a full phrase and an explanation { #the-abbr-gives-a-full-phrase-and-an-explanation }