//! Starts a new operation (opens a tansaction)
//! \param theId of operation for history (optional)
- virtual void startOperation(const std::string& theId) = 0;
+ virtual void startOperation(const std::string& theId = "") = 0;
//! Finishes the previously started operation (closes the transaction)
virtual void finishOperation() = 0;
//! Aborts the operation