final Tree tree = new Tree(parent, SWT.MULTI);
fOutlineViewer = new TreeViewer(tree);
fOutlineViewer.setAutoExpandLevel(0);
fOutlineViewer.setUseHashlookup(true);
if (SystemConfiguration.hasFeatureEnabled(Features.NEW_MODEL)) {
fOutlineViewer.setContentProvider(new NewErlContentProvider());
fOutlineViewer.setLabelProvider(new NewErlLabelProvider());
fOutlineViewer.setInput(computeInput());
} else {
fOutlineViewer.setContentProvider(editor.createOutlineContentProvider());
fOutlineViewer.setLabelProvider(editor.createOutlineLabelProvider());