void (@NotNull InspectionTreeNode node, @NotNull Set<? super RefEntity> out) { if (!node.isValid()) return; if (node instanceof RefElementNode) { final RefEntity element = ((RefElementNode)node).getElement(); out.add(element); } if (node instanceof ProblemDescriptionNode) { final RefEntity element = ((ProblemDescriptionNode)node).getElement(); out.add(element); } for (InspectionTreeNode child : node.getChildren()) { addElementsInNode(child, out); } }