/// pointer to extracted node
using exempt_ptr = cds::urcu::exempt_ptr < gc, leaf_node, value_type, typename maker::intrusive_traits::disposer,
cds::urcu::details::conventional_exempt_member_cast < leaf_node, value_type >
/// pointer to extracted node
using exempt_ptr = cds::urcu::exempt_ptr < gc, leaf_node, value_type, typename maker::intrusive_traits::disposer,
cds::urcu::details::conventional_exempt_member_cast < leaf_node, value_type >