@Deprecated
    @Override
    public boolean remove(Object o) {
        throw unsupportedTaskRemovalException();
    }

    private void removeInternal(Object o) {
        super.remove(o);
    }

    @Deprecated
    @Override
    public boolean removeAll(Collection<?> c) {
        throw unsupportedTaskRemovalException();
    }

    @Override
    public void clear() {