@Override
    public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException {
	try {
	    out.writeObject(new HashMap(this));
	}
	catch (NotSerializableException nse) {
	    NotSerializableException tmp = new NotSerializableException(nse.getMessage() + ":" + entries());
	    tmp.initCause(nse);
	    throw tmp;
	}
    }
@ Override public void writeExternal ( java . io . ObjectOutput out ) throws java . io . IOException { try { out . writeObject ( new HashMap ( this ) ) ; } catch ( NotSerializableException nse ) { NotSerializableException tmp = new NotSerializableException ( nse . getMessage ( ) + ":" + entries ( ) ) ; tmp . initCause ( nse ) ; throw tmp ; } }
TODO better implementation