Call context contains all context information related to an incoming call.
Call context manager is an entity responsible for management of contexts of incoming calls of a canister. The call context manager must be used for opening new call contexts, registering and unregistering of callback for subsequent outgoing calls and for closing call contexts.
Wrapper around the induction pool (ingress and input queues); a priority queue used for round-robin scheduling of senders when consuming input messages; and output queues.
The action the caller of