* delimited by 'null'.
   *
   * @param callerIsIdle true if the caller isn't sending any more bytes until the peer responds.
   *     This is true after a `Expect-Continue` request, false for duplex requests, and false for
   *     all other requests.
   */
  @Throws(IOException::class)
  fun takeHeaders(callerIsIdle: Boolean = false): Headers {
    this.withLock {

    public static final String CONSTRAINTS_DecimalMin_MESSAGE = "{constraints.DecimalMin.message}";

    /** The key of the message: {item} is numeric value out of bounds (<{integer} digits>.<{fraction} digits> expected). */
    public static final String CONSTRAINTS_Digits_MESSAGE = "{constraints.Digits.message}";

    /** The key of the message: {item} must be in the future. */

      K fromKey, boolean fromInclusive, K toKey, boolean toInclusive) {
    checkNotNull(fromKey);
    checkNotNull(toKey);
    checkArgument(
        comparator().compare(fromKey, toKey) <= 0,
        "expected fromKey <= toKey but %s > %s",
        fromKey,
        toKey);
    return headMap(toKey, toInclusive).tailMap(fromKey, fromInclusive);
  }

  /**

    boolean[] sharedArray = new boolean[arraysDim2];
    Arrays.fill(arrays, sharedArray);

    try {
      Booleans.concat(arrays);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testEnsureCapacity() {
    assertThat(Booleans.ensureCapacity(EMPTY, 0, 1)).isSameInstanceAs(EMPTY);

## Check the Virtual Environment is Active

Check that the virtual environment is active (the previous command worked).

/// tip

This is **optional**, but it's a good way to **check** that everything is working as expected and you are using the virtual environment you intended.

///

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
$ which python

        /* Unless key returned is null or invalid Transport.loop() always
         * calls doRecv() after and no one else but the transport thread
         * should call doRecv(). Therefore it is ok to expect that the data
         * in sbuf will be preserved for copying into BUF in doRecv().
         */

        return key;
    }

    protected void doSend( Request request ) throws IOException {

			deploymentID = formats[i].ID
		}

		// Validate if users brought different DeploymentID pools.
		if deploymentID != formats[i].ID {
			return nil, fmt.Errorf("all pools must have same deployment ID - expected %s, got %s for pool(%s)", deploymentID, formats[i].ID, humanize.Ordinal(i+1))
		}

		bootstrapTrace(fmt.Sprintf("newErasureSets: initializing %s pool", humanize.Ordinal(i+1)), func() {

var getRemoteInstanceClient = func(r *http.Request, host string) (*miniogo.Core, error) {
	cred := getReqAccessCred(r, globalSite.Region())
	// In a federated deployment, all the instances share config files
	// and hence expected to have same credentials.
	core, err := miniogo.NewCore(host, &miniogo.Options{
		Creds:     credentials.NewStaticV4(cred.AccessKey, cred.SecretKey, ""),
		Secure:    globalIsTLS,

 *       be reusable, and operations that read from the stream (including {@link #size()}, in some
 *       implementations) will prevent further operations from completing as expected.
 * </ul>
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class ByteSource {

   * Builder} constructor.
   */
  public static <K, V> Builder<K, V> builder() {
    return new Builder<>();
  }

  /**
   * Returns a new builder with a hint for how many distinct keys are expected to be added. The
   * generated builder is equivalent to that returned by {@link #builder}, but may perform better if
   * {@code expectedKeys} is a good estimate.
   *