code: public static synchronized void removeConfiguration(Configuration c,
  		String installationID)
  	{
  		for (final Iterator i = buffers.iterator(); i.hasNext();) {
  			final NetworkBuffer b = (NetworkBuffer) i.next();
  			if (b.inst.equals(installationID) || installationID == null
  				&& b.configs.contains(c)) {
  				b.removeConfiguration(c);
  				return;
  			}
  		}
  	}
docs: Removes a configuration from the network buffer identified by the installation ID.
  <p>
  If <code>installationID</code> is <code>null</code>, all network buffers are
  searched for the configuration <code>c</code>.<br>
  If the network buffer is found containing the specified configuration,
  {@link NetworkBuffer#removeConfiguration
  (tuwien.auto.calimero.buffer.Configuration)} is called on that buffer.
  
  @param c the configuration to remove
  @param installationID installation identifier for the network buffer, or
  <code>null</code>