question: public void addCmrRepositoryChangeListener ( CmrRepositoryChangeListener cmrRepositoryChangeListener ) { synchronized ( cmrRepositoryChangeListeners ) { if ( ! cmrRepositoryChangeListeners . contains ( cmrRepositoryChangeListener ) ) { cmrRepositoryChangeListeners . add ( cmrRepositoryChangeListener ) ; } } }
target:  Registers a CMR repository change listener to this CMR if it was not already.