}

    /**
     * Checks if a checkbox value represents an enabled state.
     * This method considers "on" and "true" (case-insensitive) as enabled values.
     *
     * @param value the checkbox value to check
     * @return true if the value represents an enabled checkbox, false otherwise
     */
    public static boolean isCheckboxEnabled(final String value) {
        if (value == null) {
            return false;
        }

        });
    }

    /**
     * Retrieves a parameter value from the data store parameters map.
     *
     * @param paramMap the parameter map to search
     * @param key the parameter key to look up
     * @param defaultValue the default value to return if key is not found
     * @return the parameter value as a string, or the default value if not found
     */

   * Object[])} comparator when comparing a value outside the set of values it can compare.
   * Extending {@link ClassCastException} may seem odd, but it is required.
   */
  static final class IncomparableValueException extends ClassCastException {
    final Object value;

    IncomparableValueException(Object value) {
      super("Cannot compare value: " + value);
      this.value = value;
    }

   * (The inverse of this will be a horizontal transformation.)
   */
  public static LinearTransformation vertical(double x) {
    checkArgument(isFinite(x));
    return new VerticalLinearTransformation(x);
  }

  /**
   * Builds an instance representing a horizontal transformation with a constant value of {@code y}.

  abstract void setCountCheckReturnValue(E element, int count);

  /**
   * Call the {@code setCount()} method under test, but do not check its return value. Callers
   * should use this method over {@link #setCountCheckReturnValue(Object, int)} when they expect
   * {@code setCount()} to throw an exception, as checking the return value could produce an

        return field.getInt(response);
    }

    private void setStatus(NetServerEnum2Response response, int value) throws Exception {
        Method method = getSuperclassMethod(response.getClass(), "setStatus", int.class);
        method.setAccessible(true);
        method.invoke(response, value);
    }

    private int getConverter(NetServerEnum2Response response) throws Exception {

      Entry<K, V> nefariousMapEntry(K key, V value) {
    return new Entry<K, V>() {
      @Override
      public K getKey() {
        return key;
      }

      @Override
      public V getValue() {
        return value;
      }

      @Override
      public V setValue(V value) {
        throw new UnsupportedOperationException();
      }

     *
     * @param value the input string to be escaped
     * @return the escaped XML string with invalid characters removed, or empty string if value is null
     */
    public static String escapeXml(final String value) {
        if (value == null) {
            return StringUtil.EMPTY;
        }
        return stripInvalidXMLCharacters(//
                value//

  @MapFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testRemove_present() {
    int initialSize = getMap().size();
    assertEquals("remove(present) should return the associated value", v0(), getMap().remove(k0()));
    assertEquals(
        "remove(present) should decrease a map's size by one.", initialSize - 1, getMap().size());
    expectMissing(e0());
  }

    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_presentNullValueUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().replace(k0(), v0(), null));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)