_project = project;
_preferences = IdeaUtilImpl.getPluginComponent(project).getPreferences();
_groupBy = GroupBy.getSortOrderGroup(GroupBy.BugCategory); // default sort oder group
_visibleRootNode = new RootNode(_project.getName());
_treeModel = new GroupTreeModel(_visibleRootNode, _groupBy, _project);
//noinspection ThisEscapedInObjectConstruction
_bugTree = new BugTree(_treeModel, this, _project);
final JScrollPane treeScrollPane = ScrollPaneFacade.createScrollPane();