bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), void* data, double rate);
bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), void* data, double rate);