Crest::ColumnExistException Node1 Crest::ColumnExistException + ColumnExistException() Node2 Crest::CrestBaseException # m_type + what() + getType() # CrestBaseException() Node2->Node1 Node3 std::exception Node3->Node2 Node4 std::string Node4->Node2 #m_text Node5 std::basic_string< char > Node5->Node4