code: public static <V> CheckedCallable<V, IOException> getGoogleRequestCallable(
        AbstractGoogleClientRequest<V> request) {
      return new AbstractGoogleClientRequestExecutor<>(request);
    }
docs: Returns a {@link CheckedCallable} that encompasses a {@link AbstractGoogleClientRequest} and
  can be used to retry the execution for an AbstractGoogleClientRequest.
  
  @param request The AbstractGoogleClientRequest to turn into a {@link CheckedCallable}.
  @return a CheckedCallable object that attempts a AbstractGoogleClientRequest