* similar to the {@code basename} unix command. The result does not include the '{@code .}'.
   *
   * @param file The name of the file to trim the extension from. This can be either a fully
   *     qualified file name (including a path) or just a file name.
   * @return The file name without its path or extension.
   * @since 14.0
   */
  public static String getNameWithoutExtension(String file) {
    checkNotNull(file);

   *               },
   *               executor)
   *           .closing(executor);
   * }</pre>
   */
  // TODO(cpovirk): Use simple name instead of fully qualified after we stop building with JDK 8.
  @com.google.errorprone.annotations.DoNotMock(
      "Use ClosingFuture.whenAllSucceed() or .whenAllComplete() instead.")
  public static class Combiner {