private static Collection<BasePsiNode<? extends PsiElement>> getChildren(final Project project, final Form form, final ViewSettings settings) {
    final Set<BasePsiNode<? extends PsiElement>> children = new LinkedHashSet<>();
    children.add(new ClassTreeNode(project, form.getClassToBind(), settings));
    for (PsiFile formBoundToClass : form.getFormFiles()) {
      children.add(new PsiFileNode(project, formBoundToClass, settings));
    }
    return children;
  }
private static Collection<BasePsiNode<? extends PsiElement>> getChildren(final Project project, final Form form, final ViewSettings settings)