miniflow_clone(struct miniflow *dst, const struct miniflow *src,
               size_t n_values)
{
    *dst = *src;   /* Copy maps. */
    memcpy(miniflow_values(dst), miniflow_get_values(src),
           MINIFLOW_VALUES_SIZE(n_values));
}
miniflow_clone(struct miniflow *dst, const struct miniflow *src,
               size_t n_values)
{
    *dst = *src;    
    memcpy(miniflow_values(dst), miniflow_get_values(src),
           MINIFLOW_VALUES_SIZE(n_values));
}