public synchronized void addEntry(SnmpOid rowOid, ObjectName objname, Object entry)
     throws SnmpStatusException {
   if (!(entry instanceof JvmRTLibraryPathEntryMBean))
     throw new ClassCastException(
         "Entries for Table \""
             + "JvmRTLibraryPathTable"
             + "\" must implement the \""
             + "JvmRTLibraryPathEntryMBean"
             + "\" interface.");
   super.addEntry(rowOid, objname, entry);
 }