$translation = erTranslationClassLhTranslation::getInstance();This code creates a new instance of the LH Translation class using the getInstance method and assigns it to the variable $translation. The erTranslationClassLhTranslation getInstance method is part of the erLhcoreClassLanguage library package, which is a language translation library for the Live Helper Chat application. In summary, the erTranslationClassLhTranslation getInstance method is used to create a singleton instance of the LH Translation class for translating messages and text in different languages and is included in the erLhcoreClassLanguage library package.