sixel_allocator_destroy(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to
                                               be destroyed */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_free);

    allocator->fn_free(allocator);
}
sixel_allocator_destroy(
    sixel_allocator_t   *allocator)   
{
     
    assert(allocator);
    assert(allocator->fn_free);

    allocator->fn_free(allocator);
}