/**
  * @param TransferFundsRequest $request
  */
 public function transfer(TransferFundsRequest $request)
 {
     $fromMember = $this->members->with($request->fromMemberId());
     $toMember = $this->members->with($request->toMemberId());
     $fromMember->transfer($request->amount(), $toMember);
     $this->members->update($fromMember);
     $this->members->update($toMember);
     $this->publisher()->publish($fromMember->events());
     $this->notifier()->transferCompleted(new TransferFundsResponse($fromMember, $toMember));
 }