return s.charAt(rand.nextInt(s.length()));
  }

  /**
   * Provides samples on a random distribution derived from the web.
   *
   * <p>Adapted from data provided by Mark Davis.
   *
   * @author Christopher Swenson
   */
  static class CharSamples {

    static {
      populateProb1();
      populateProb2();
      populateChars1();
      populateChars2();

                        mark = si + 1;
                        state = 5;
                    }
                    break;
                case 5:
                    if (ch == '=') {
                        key = str.substring(mark, si).trim();
                        mark = si + 1;
                    } else if (ch == ',' || ch == ']') {

    assertThat(expected).hasMessageThat().isEqualTo("Mark not set");
  }

  public void testMarkNotSupported() {
    counter = new CountingInputStream(new UnmarkableInputStream());

    IOException expected = assertThrows(IOException.class, () -> counter.reset());
    assertThat(expected).hasMessageThat().isEqualTo("Mark not supported");
  }

    }

    /**
     * Mark a project as required and activated.
     * @param selector The selector of the project.
     */
    public void activateRequiredProject(String selector) {
        this.activations.add(new ProjectActivationSettings(selector, ActivationSettings.ACTIVATION_REQUIRED));
    }

    /**
     * Mark a project as optional and activated.

  public static final Charset UTF_16LE = Charset.forName("UTF-16LE");

  /**
   * UTF-16: sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order
   * mark.
   *
   * <p><b>Java 7+ users:</b> this constant should be treated as deprecated; use {@link
   * java.nio.charset.StandardCharsets#UTF_16} instead.
   *
   */
  @J2ktIncompatible

    assertEquals(big[1], small[3]);
  }

  public void testLimit_mark() throws Exception {
    byte[] big = newPreFilledByteArray(5);
    InputStream bin = new ByteArrayInputStream(big);
    InputStream lin = ByteStreams.limit(bin, 2);

    int read = lin.read();
    assertEquals(big[0], read);
    lin.mark(2);

    read = lin.read();
    assertEquals(big[1], read);
    read = lin.read();

        return false;
    }

    // ===================================================================================
    //                                                                     Birthplace Mark
    //                                                                     ===============
    @Override
    public void markAsSelect() {
        __createdBySelect = true;
    }

    @Override

                    e);
          }
        }
      } finally {
        if (stillRunning) {
          // An Error is bubbling up. We should mark ourselves as no longer running. That way, if
          // anyone tries to keep using us, we won't be corrupted.
          synchronized (PerListenerQueue.this) {
            isThreadScheduled = false;
          }
        }

    return (1 << (metadata & CompactHashing.HASH_TABLE_BITS_MASK)) - 1;
  }

  void incrementModCount() {
    metadata += CompactHashing.MODIFICATION_COUNT_INCREMENT;
  }

  /**
   * Mark an access of the specified entry. Used only in {@code CompactLinkedHashMap} for LRU
   * ordering.
   */
  void accessEntry(int index) {
    // no-op by default
  }

  @CanIgnoreReturnValue
  @Override

    return get(key) != null;
  }

  @Override
  public boolean containsValue(@CheckForNull Object value) {
    return values().contains(value);
  }

  // Overriding to mark it Nullable
  @Override
  @CheckForNull
  public abstract V get(@CheckForNull Object key);

  /**
   * @since 21.0 (but only since 23.5 in the Android <a