/// Metafunction converting option list to traits
/**
\p Options are:
- - \p opt::lock_type - mutex type, default is \p cds::lock::Spin
+ - \p opt::lock_type - mutex type, default is \p cds::sync::spin
- \p opt::back_off - back-off strategy, defalt is \p cds::backoff::Default
- \p opt::disposer - the functor used for dispose removed items. Default is \p opt::intrusive::v::empty_disposer.
This option is used only in \p FCStack::clear() function.