code: @NotNull
    public static <T> Observable<Response<T>> from(@NotNull final ApolloQueryWatcher<T> watcher) {
      return from(watcher, Emitter.BackpressureMode.LATEST);
    }
docs: Converts an {@link ApolloQueryWatcher} into an Observable. Honors the back pressure from downstream with the back
  pressure strategy {@link rx.Emitter.BackpressureMode#LATEST}.
  
  @param watcher the ApolloQueryWatcher to convert
  @param <T>     the value type
  @return the converted Observable