private static boolean isFakePsiInNormalFile(@NotNull PsiElement element, @NotNull PsiFile containingFile) {
    if (element.isPhysical()) return false;
    if (containingFile.isPhysical()) return true; // non-physical PSI in physical file, suspicious

    // in normal non-physical files there might also be fake PSI, so let's (expensively!) check we can find it by offset
    // hopefully in some future we'll prohibit such fake PSI
    TextRange range = element.getTextRange();
    return range == null ||
           PsiTreeUtil.findElementOfClassAtRange(containingFile, range.getStartOffset(), range.getEndOffset(), element.getClass()) != element;
  }
private static boolean isFakePsiInNormalFile(@NotNull PsiElement element, @NotNull PsiFile containingFile)