returns whether something changed compared to the last safe . concode_field_sep int currentVersionIndex concode_elem_sep int savePosition concode_elem_sep List<Delta<String>> deltas concode_elem_sep String currentVersion concode_field_sep void doSave concode_elem_sep boolean canUndo concode_elem_sep void undo concode_elem_sep List<String> split concode_elem_sep void setModelFromString concode_elem_sep void insertNewVersion concode_elem_sep void fireStackChanged concode_elem_sep void redo concode_elem_sep String join concode_elem_sep boolean canRedo concode_elem_sep int debugGetSize
boolean function ( ) { return currentVersionIndex != savePosition ; }