SetResult
void SetResult(status_t result);
SetResult(B_NO_ERROR);
SetResult(B_ERROR);
SetResult(B_NO_ERROR);
SetResult(B_ERROR);
SetResult(B_OK);
SetResult(B_ERROR);
void SetResult(BMessage* result);
messenger->SetResult(NULL);
messenger->SetResult(NULL);
messenger->SetResult(NULL);
messenger->SetResult(new BMessage(reply));
SetResult(B_ERROR);
SetResult(B_NO_ERROR);
SetResult(B_ERROR);
SetResult(B_NO_ERROR);
SetResult(B_ERROR);
SetResult(B_NO_ERROR);