* This version of PA doclet only supports {@link LanguageVersion#JAVA_1_5}.
*
* @return the supported language version
*/
public static LanguageVersion languageVersion() {
LanguageVersion lv = languageVersionHelper();
if (lv != LanguageVersion.JAVA_1_5) {
throw new RuntimeException("This version of "+PublishedApiDoclet.class.getName()+
" only supports language version "+LanguageVersion.JAVA_1_5+" but the "+
"delegate doclet uses language version "+lv);
}