virtual void write_to_socket (std::shared_ptr<Socket>) const = 0;
/** @return true if our image is definitely the same as another, false if it is probably not */
virtual bool same (std::shared_ptr<const ImageProxy>) const = 0;
virtual void write_to_socket (std::shared_ptr<Socket>) const = 0;
/** @return true if our image is definitely the same as another, false if it is probably not */
virtual bool same (std::shared_ptr<const ImageProxy>) const = 0;