@Contract("null, _ -> false")
  public static boolean isInheritor(@Nullable PsiClass psiClass, @NotNull @NonNls String baseClassName) {
    return isInheritor(psiClass, false, baseClassName);
  }
@Contract("null, _ -> false")
  public static boolean isInheritor(@Nullable PsiClass psiClass, @NotNull @NonNls String baseClassName)