public static @Unmodifiable @NotNull <T extends PsiElement> Collection<T> findChildrenOfType(@Nullable PsiElement element, @NotNull Class<? extends T> aClass) {
    return findChildrenOfAnyType(element, true, aClass);
  }
public static @Unmodifiable @NotNull <T extends PsiElement> Collection<T> findChildrenOfType(@Nullable PsiElement element, @NotNull Class<? extends T> aClass)