}

  private interface IteratorOperation {
    @Nullable Object execute(Iterator<?> iterator);
  }

  /**
   * Apply this method to both iterators and return normally only if both produce the same response.
   *
   * @see Stimulus#executeAndCompare(ListIterator, Iterator)
   */
  @SuppressWarnings("CatchingUnchecked") // sneaky checked exception
  private <T extends Iterator<E>> void internalExecuteAndCompare(

  }

  private interface IteratorOperation {
    @Nullable Object execute(Iterator<?> iterator);
  }

  /**
   * Apply this method to both iterators and return normally only if both produce the same response.
   *
   * @see Stimulus#executeAndCompare(ListIterator, Iterator)
   */
  @SuppressWarnings("CatchingUnchecked") // sneaky checked exception
  private <T extends Iterator<E>> void internalExecuteAndCompare(

     * contrast to the "V?" type that we're using. As a result, Kotlin sees a conflict between the
     * nullness annotations in ImmutableMap and those in its own Map type. In response, it considers
     * the parameter and return type both to be platform types. As a result, Kotlin permits calls
     * that can lead to NullPointerException. That's unfortunate. But hopefully most Kotlin callers

  /**
   * The HTTP <a
   * href="https://wicg.github.io/responsive-image-client-hints/#sec-ch-viewport-width">{@code
   * Sec-CH-Viewport-Width}</a> header field name.
   *
   * @since 32.0.0
   */
  public static final String SEC_CH_VIEWPORT_WIDTH = "Sec-CH-Viewport-Width";
  /**
   * The HTTP <a
   * href="https://wicg.github.io/responsive-image-client-hints/#sec-ch-viewport-height">{@code