size_t ::::Response::printTo(Print& p) { size_t n{0}; n += p.print(Arg::); n += p.print(" = "); n += p.println(get()); return n; } bool :: { ActionRequestControl request(*this, ::actionName); request.setArg(::Arg::, ); return request.send(callback ? [callback](ActionResponse response) { callback(response); } : ActionRequestControl::Callback()); }