27. Intercepting Messages via Delegation

Delegation is a means by which a library writer can intercept messages sent via a proxy. This is typically used to construct communication libraries. A library creates a special kind of Group called a DelegationManager, which receives the messages sent via a delegated proxy. There are two parts to the delegation interface- a very small client-side interface to enable delegation, and a more complex manager-side interface to handle the resulting redirected messages.

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