question: private boolean isLanguageAllowed ( String languageKey ) { if ( allowedLanguages == null ) return true ; return allowedLanguages . contains ( languageKey ) ; }
target:  Returns whether a language having the given key should be allowed to be loaded. If language availability restrictions are imposed through guacamole.properties, this may return false in some cases. By default, this function will always return true. Note that just because a language key is allowed to be loaded does not imply that the language key is valid.