*/
  public Optional<Long> sizeIfKnown() {
    return Optional.absent();
  }

  /**
   * Returns the size of this source in bytes, even if doing so requires opening and traversing an
   * entire stream. To avoid a potentially expensive operation, see {@link #sizeIfKnown}.
   *
   * <p>The default implementation calls {@link #sizeIfKnown} and returns the value if present. If

        }

        /*
         * Subtract the server and share from the pathConsumed so that
         * it reflects the part of the relative path consumed and not
         * the entire path.
         */

        DfsReferralDataInternal next = dri;
        do {
            next.stripPathConsumed(1 + server.length() + 1 + share.length());
            next = next.next();

    assertThat(response.body.string()).isEqualTo("a")
    assertThat(eventRecorder.recordedEventTypes())
      .containsExactly(CallStart::class, CallEnd::class)
  }

  /** Response headers start, then the entire request body, then response headers end.  */
  @Test
  fun expectContinueStartsResponseHeadersEarly() {
    server.enqueue(
      MockResponse
        .Builder()
        .add100Continue()

      prev = curr;
    }
    // prev represents the 'innermost' future
    prev.set("done");
    assertTrue(orig.isDone());
  }

  // Verify that StackOverflowError in a long chain of SetFuture doesn't cause the entire toString
  // call to fail
  @J2ktIncompatible
  @GwtIncompatible
  @AndroidIncompatible // b/391667564: crashes from stack overflows
  public void testSetFutureToString_stackOverflow() {

            // Verify nonce structure
            assertEquals(16, nonce.length, "GCM secure nonce should be 16 bytes");

            // Check that secure nonces provide full diversity (entire nonce is random)
            String nonceHex = bytesToHex(nonce);
            nonceSet.add(nonceHex);
        }

        // Verify that secure nonces provide excellent diversity

     * efficient as manually copying as it employs an additional write
     * thread to read and write data concurrently.
     * <br>
     * It is not possible (nor meaningful) to copy entire workgroups or
     * servers.
     *
     * @param dest
     *            the destination file or directory
     * @throws CIFSException if an error occurs accessing the resource
     */

     * efficient as manually copying as it employs an additional write
     * thread to read and write data concurrently.
     *
     * It is not possible (nor meaningful) to copy entire workgroups or
     * servers.
     *
     * @param dest the destination file or directory
     * @throws SmbException if an error occurs during the copy operation
     */

    result in it OkHttp starting a thread for each queued task, even when a single thread could run
    all of them.

 *  Fix: Address a performance bug in `MultipartReader`. We were scanning the entire input stream
    for a delimiter when we only needed to scan enough to return a result.

 *  Fix: Don't double-compress the public suffix database. OkHttp is usually distributed in a

      prev = curr;
    }
    // prev represents the 'innermost' future
    prev.set("done");
    assertTrue(orig.isDone());
  }

  // Verify that StackOverflowError in a long chain of SetFuture doesn't cause the entire toString
  // call to fail
  @J2ktIncompatible
  @GwtIncompatible
  @AndroidIncompatible // b/391667564: crashes from stack overflows
  public void testSetFutureToString_stackOverflow() {

        map.removalNotificationQueue.offer(notification);
      }
    }

    /**
     * Performs eviction if the segment is over capacity. Avoids flushing the entire cache if the
     * newest entry exceeds the maximum weight all on its own.
     *
     * @param newest the most recently added entry
     */
    @GuardedBy("this")