public static boolean shouldEnableDeleteAction(PsiElement[] elements) {
    if (elements == null || elements.length == 0) return false;
    for (PsiElement element : elements) {
      VirtualFile virtualFile = PsiUtilCore.getVirtualFile(element);
      if (virtualFile == null || virtualFile instanceof LightVirtualFile) {
        return false;
      }
      if (!WritingAccessProvider.isPotentiallyWritable(virtualFile, element.getProject())) {
        return false;
      }
    }
    return true;
  }
public static boolean shouldEnableDeleteAction(PsiElement[] elements)