This class encapsulates a special chainer. Instead of establishing a connection to a server, it creates a new proxy instance and connects the server side of the current (parent) proxy to the client side of the new (child) proxy. The right_class parameter specifies the child proxy.

It is possible to stack multiple proxies side-by-side. The final step of sidestacking is always to specify a regular chainer via the right_chainer parameter that connects the last proxy to the destination server.