+ IoImpl& set_size(sg_size_t size);
+ IoImpl& set_type(s4u::Io::OpType type);
+ IoImpl& set_storage(resource::StorageImpl* storage);
+ IoImpl& set_disk(resource::DiskImpl* disk);
+
+ sg_size_t get_performed_ioops() { return performed_ioops_; }
+
+ IoImpl* start();