public:
friend XBT_PUBLIC void intrusive_ptr_release(simgrid::s4u::Io* i);
friend XBT_PUBLIC void intrusive_ptr_add_ref(simgrid::s4u::Io* i);
public:
friend XBT_PUBLIC void intrusive_ptr_release(simgrid::s4u::Io* i);
friend XBT_PUBLIC void intrusive_ptr_add_ref(simgrid::s4u::Io* i);