+ std::ostream& operator<<(std::ostream& os, Z_APDU& zapdu);
+ std::ostream& operator<<(std::ostream& os, Z_HTTP_Request& httpreq);
+ std::ostream& operator<<(std::ostream& os, Z_HTTP_Response& httpres);
+ std::ostream& operator<<(std::ostream& os, Z_Records & rs);
+ std::ostream& operator<<(std::ostream& os, Z_DiagRec& dr);
+ std::ostream& operator<<(std::ostream& os, Z_DefaultDiagFormat& ddf);