String language = msg.getLanguage();
if ( (!CaseInsensitiveString.equalsIgnoreCase(FIPANames.ContentLanguage.FIPA_SL0, language)) &&
(!CaseInsensitiveString.equalsIgnoreCase(FIPANames.ContentLanguage.FIPA_SL1, language)) &&
(!CaseInsensitiveString.equalsIgnoreCase(FIPANames.ContentLanguage.FIPA_SL2, language)) &&
(!CaseInsensitiveString.equalsIgnoreCase(FIPANames.ContentLanguage.FIPA_SL, language))) {
throw new UnsupportedValue("language");
}
}