protected void showOverview() {
   for (SmiModule module : m_mib.get().getModules()) {
     for (SmiSymbol symbol : module.getSymbols()) {
       String msg =
           module.getId() + ": " + symbol.getId() + ": " + symbol.getClass().getSimpleName();
       if (symbol instanceof SmiOidValue) {
         SmiOidValue oidValue = (SmiOidValue) symbol;
         msg += ": " + oidValue.getOidStr();
       }
       System.out.println(msg);
     }
   }
 }