code: public void removeConfiguration(Configuration c)
  	{
  		if (configs.remove(c)) {
  			((ConfigImpl) c).unregister();
  			logger.info("removed configuration of " + c.getBaseLink().getName());
  		}
  	}
docs: Removes a configuration from this network buffer.
  <p>
  The configuration is deactivated and will not receive any further events or
  incoming messages from the base network link supplied at creation of that
  configuration.
  
  @param c the configuration to remove