Allow chaincode to chaincode invoke set event

This is to request a feature. Lets say Client C calls a chaincode S, and that chaincode (using chaincode to chaincode call) invokes chaincode T, now if T sets some event, currently that event is lost, as per docs:
```
// Only a single event can be included in a transaction, and must originate
// from the outer-most invoked chaincode in chaincode-to-chaincode scenarios.
```

But I read that same transaction context is used to do chaincode to chaincode invocation, so why can't the event set in chaincode T be passed to the whole transaction, and thus that event can also be emitted (if S doesn't emit any other event later)?

This feature is very much required for a project that our team is working on.