+ /// synchronize with repository, returns log
+ virtual std::string repoUpdate() = 0;
+ // can be this operation processed in the current RCS?
+ virtual bool repoUpdateEnabled() = 0;
+ // toggle locking property of the file
+ virtual std::string lockingToggle() = 0;
+ // can be this operation processed in the current RCS?
+ virtual bool lockingToggleEnabled() = 0;