throw new DataScope.ParameterError("NodeDS: wrong number of parameters");
throw new DataScope.ParameterError("AgentDS: wrong number of parameters");
    protected void verifyParameters(Object[] parameters) 	throws DataScope.ParameterError    {	if (parameters == null || parameters.length != 1) {	    throw new DataScope.ParameterError("NodeDS: wrong number of parameters");	}	if (!(parameters[0] instanceof String)) {	    throw new DataScope.ParameterError("NodeDS: wrong parameter type");	} else {	    // could canonicalize here	    String agentname = (String) parameters[0];	    // System.err.println("#### Created AgentDS for " +agentname);	    bindSymbolValue(AGENTNAME, agentname);	}    }