https://docs.oracle.com/javase/8/docs/api/java/util/Locale.LanguageRange.html?is-external=true
Locale.LanguageRange (Java Platform SE 8 )
java platformlocalese
https://pekko.apache.org/japi/pekko-http/snapshot/org/apache/pekko/http/scaladsl/model/headers/LanguageRange.One$.html
LanguageRange.One$
declaration: package: org.apache.pekko.http.scaladsl.model.headers, interface: LanguageRange, class: One$
one
https://pekko.apache.org/japi/pekko-http/snapshot/org/apache/pekko/http/impl/util/JavaMapping.LanguageRange$.html
JavaMapping.LanguageRange$
declaration: package: org.apache.pekko.http.impl.util, interface: JavaMapping, class: LanguageRange$