@Suspendable fun initiateFlow(destination: Destination): FlowSession
Creates a communication session with destination. Subsequently you may send/receive using this session object. How the messaging is routed depends on the Destination type, including whether this call does any initial communication.
@Suspendable fun initiateFlow(party: Party): FlowSession
Creates a communication session with party. Subsequently you may send/receive using this session object. Note that this function does not communicate in itself, the counter-flow will be kicked off by the first send/receive.