void () { SliceTreeStructure treeStructure = configureTree("Tuple"); SliceNode root = treeStructure.getRootElement(); SliceLeafAnalyzer analyzer = JavaSlicerAnalysisUtil.createLeafAnalyzer(); Collection<PsiElement> leaves = analyzer.calcLeafExpressions(root, treeStructure, analyzer.createMap()); assertNotNull(leaves); assertEmpty(leaves); }