@Override public void createPartControl(Composite parent) { super.createPartControl(parent); final TreeViewer viewer = getNavigatorViewer(); assert viewer != null; viewer.getTree().setHeaderVisible(true); createColumns(viewer); UIUtils.setHelp(parent, IHelpContextIds.CTX_PROJECT_EXPLORER); viewer.addFilter( new ViewerFilter() { @Override public boolean select(Viewer viewer, Object parentElement, Object element) { return !(element instanceof DBNProjectDatabases); } }); updateTitle(); }