@Override
  public int compare(NodeDescriptor nodeDescriptor1, NodeDescriptor nodeDescriptor2) {
    int weight1 = getWeight(nodeDescriptor1);
    int weight2 = getWeight(nodeDescriptor2);
    if (weight1 != weight2) {
      return weight1 - weight2;
    }
    if (!(nodeDescriptor1.getParentDescriptor() instanceof ProjectViewProjectNode)){
      if (nodeDescriptor1 instanceof PsiDirectoryNode || nodeDescriptor1 instanceof PsiFileNode){
        return nodeDescriptor1.toString().compareToIgnoreCase(nodeDescriptor2.toString());
      }
      if (nodeDescriptor1 instanceof ClassTreeNode && nodeDescriptor2 instanceof ClassTreeNode){
        if (((ClassTreeNode)nodeDescriptor1).isTopLevel()){
          return nodeDescriptor1.toString().compareToIgnoreCase(nodeDescriptor2.toString());
        }
      }
    }
    return Integer.compare(nodeDescriptor1.getIndex(), nodeDescriptor2.getIndex());
  }
@Override
  public int compare(NodeDescriptor nodeDescriptor1, NodeDescriptor nodeDescriptor2)