Function pushThrough

pushThrough(
    service: MockService,
    windowId: string,
    message: NappletMessage,
    send: (msg: NappletMessage) => void,
): boolean
Deliver an envelope through a caller-supplied send and record it in mock.sent. Use it when the push belongs to an earlier request whose runtime callback already carries the right lifecycle checks, such as relay.event for a live relay.subscribe, exactly as the reference services do.
Parameters
- service: MockService
  A mock from defineMockService.
- windowId: string
  Recipient window (for the sent record).
- message: NappletMessage
  Envelope to deliver.
- send: (msg: NappletMessage) => void
  The request callback to deliver through.
Returns boolean
false when service was not built by defineMockService.
Example
```
pushThrough(relay, sub.windowId, { type: 'relay.event', subId: sub.subId, result } as NappletMessage, sub.send);
```
- Defined in packages/mocks/src/core/handler.ts:330