https://openjdk.java.net/ 
public interface sun.util.locale.provider.LocaleDataMetaInfo
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.util.locale.provider.LocaleDataMetaInfo
  super_class: java.lang.Object
{
  public abstract sun.util.locale.provider.LocaleProviderAdapter$Type getType();
    descriptor: ()Lsun/util/locale/provider/LocaleProviderAdapter$Type;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.String availableLanguageTags(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      category  
}
SourceFile: "LocaleDataMetaInfo.java"
InnerClasses:
  public final Type = sun.util.locale.provider.LocaleProviderAdapter$Type of sun.util.locale.provider.LocaleProviderAdapter