code: public static <T> Callable<T> callable(CheckedCallable<T> callable) {
          return callable(callable, THROWABLE_TO_RUNTIME_EXCEPTION);
      }
docs: Wrap a {@link CheckedCallable<T>} in a {@link Callable<T>}.
  <p>
  Example:
  <code><pre>
  Executors.newFixedThreadPool(1).submit(Unchecked.callable(() -> {
  throw new Exception("Cannot execute this task");
  })).get();
  </pre></code>