C++ (Qt)m_dfsOperationObserver = (new Helper::DfsSendOperationObserver(std::bind(&DfsFilesSender::onFileSent, this, _1, _2)))
C++ (Qt)std::bind(&MainClass::func, this)
C++ (Qt)std::function<QString()> func
C++ (Qt)using DoneCallback=std::function<void(CAPRESULT result)>;