code: @Override
  	public void check() throws JMSException
  	{
  		if (destinationType == null)
  			throw new InvalidDescriptorException("Missing destination reference property : 'destinationType'");
  		if (!destinationType.equals("queue") && !destinationType.equals("topic"))
  			throw new InvalidDescriptorException("Destination reference property 'destinationType' should be one of : queue, topic");
  		if (destinationName == null)
  			throw new InvalidDescriptorException("Missing destination reference property : 'destinationName'");
  	}
docs: /* (non-Javadoc)
  @see net.timewalker.ffmq4.utils.Checkable#check()