Throwable rememberDisposedTrace(@NotNull Disposable object, @Nullable Throwable trace) {
    if (object instanceof CheckedDisposable) {
      return null;
    }
    return myDisposedObjects.put(object, ObjectUtils.notNull(trace, UNKNOWN_TRACE));
  }
Throwable rememberDisposedTrace(@NotNull Disposable object, @Nullable Throwable trace)