public static @Nullable String generateExternalJavadoc(final @NotNull PsiElement element, @Nullable List<String> docURLs) {
    final JavaDocInfoGenerator javaDocInfoGenerator = JavaDocInfoGeneratorFactory.create(element.getProject(), element);
    return generateExternalJavadoc(javaDocInfoGenerator, docURLs);
  }
public static @Nullable String generateExternalJavadoc(final @NotNull PsiElement element, @Nullable List<String> docURLs)