404. That’s an error.

The requested URL /translate_c?depth=1&pto=aue&rurl=translate.google.ru&sl=en&sp=nmt4&tl=ru&u=http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/base/Optional.html&usg=ALkJrhhEntv0tUqV2sL9SAxStozWW4ET7A was not found on this server. That’s all we know.