Function expectationFor

expectationFor(envelopeType: string, event: unknown): Expectation
Returns what point 6 compares for an event (Design note 8 of M2-29).

Rows: agent.invocation (run, thread, and by trigger_kind message_id, interaction_id or command_id), agent.followup (run, thread, message_id), interaction.created (interaction.id, its run_id and thread_id), command.invoked (command_id, run_id and thread_id when present), command.autocomplete_requested (command_id, its thread when present, no run). AgentInvocationPayload has no command_id yet (only command_invocation_id), so trigger_kind = command has no counterpart and every such token is invalid. IDs are compared in their canonical lower-case form.
Parameters
- envelopeType: string
  The envelope type.
- event: unknown
  The event (an envelope or a decoded event with payload).
Returns Expectation
The expectation.
Throws
RangeError when the type carries no invocation token; TypeError when the payload is not the payload of that type.
Example
```
const expect = expectationFor(envelope.type, envelope);
const check = await verifier.check(token, expect, actual);
```